cFosSpeed Changelog

What's new in cFosSpeed 12.51 Build 2532 Beta

Aug 23, 2022
  • Fixed detection of IPv6 networks that need to be included in Traffic Shaping.
  • Fixed a bug where the Game Analyzer would not display any RX/TX traffic if Net Talk was switched off.

New in cFosSpeed 12.51 Build 2531 Beta (Jul 14, 2022)

  • Fixed detection of IPv6 networks that need to be included in Traffic Shaping. Thanks to Josef S. for help.
  • Fixed a bug where the Game Analyzer would not display any RX/TX traffic if Net Talk was switched off. Thanks to Michael H. for testing.

New in cFosSpeed 12.50 Build 2524 (Jun 26, 2022)

  • Try to use Webview when starting the Game Analyzer from the context menu.
  • Fixed a bug where the Game Analyzer would sometimes flicker with Chrome.

New in cFosSpeed 12.01 Build 2523 Beta (May 13, 2022)

  • New! The cFosSpeed Game Analyzer: When you are gaming there are often situations where both your Internet connection and your computer performance is very important. So if you are in a big fight and experience problems, the Game Analyzer can help you diagnose bottlenecks in speed, latency, CPU, GPU, and memory performance. Click on "Game Analayzer" in the cFosSpeed context menu to open it.

New in cFosSpeed 12.01 Build 2519 Beta (Mar 8, 2022)

  • The built-in UI HTTP server now prefers its own mime types. This prevents UI loading problems if Windows mime types have the wrong values.
  • Fixed a bug where "Expires" HTTP header was sometimes garbled. Old .HTA functionality that was removed in cFosSpeed 10.20 is available again.

New in cFosSpeed 12.01 Build 2516 Beta (Jul 29, 2021)

  • Added pcnt statistics for RSC and LSO packets. Use "spd pcnt" to display.

New in cFosSpeed 12.01 Build 2515 Beta (Jul 14, 2021)

  • Improved name tags for the frequency usage graph.

New in cFosSpeed 12.01 Build 2514 Beta (Jul 4, 2021)

  • The "Adapter Info" UI now displays WiFi frequency usage graphs for the 2.4 GHz, 5 GHz and 6+ GHz bands. This can help you optimize the used WiFi channels for optimal performance.

New in cFosSpeed 12.00 Build 2512 (Jun 15, 2021)

  • Much improved dialogs:
  • We completely reworked the cFos Speed configuration dialogs. They now use a comprehensive HTTP API (see https://www.cfos.de/de/cfosspeed/documentation/web-api.htm ) and Vue.js and Bootstrap and are thus responsive and easier to maintain We hope you enjoy the new design!
  • In addition, cFosSpeed can now use Chromium Webview2 to display its dialogs. This means that the new dialogs are displayed in our own window, instead ofthe default web browser window. This allows for improved visual experience and pre-loading of the HTML / Javascript code
  • Finally, due to public demand: Added port prioritization to preferences UI
  • You can specify local and remote ports (both TCP and UDP ports will be matched), either individual ports, a range, or a combination of both E.g. "80,443,1000:1010" will match ports 80 and 443, and ports 1000-1010
  • New commands "setkey" and "querysect", which are slightly changed versions of "addkey" and "showsect". Syntax is as follows:
  • setkey <section> <key> <value> set <key>=<value> in <section>
  • querykey <section> <key> query <key> from <section>
  • delkey <section> <key> delete <key> from <section>
  • querysect <section> query section <section>
  • <section> can have a filename in front, separated by a "/". Otherwise, the file is settings.ini
  • All port filter expressions (-[sdlr]port, -tcp-[sdlr]port, -udp-[sdlr]port) now accept sections in .ini files as well. This can be mixed with regular port ranges. Example in settings.ini: filter=-lport 1,2:4,@user.ini/higherlports -c higher
  • The current connections dialogs now "freeze" when closed, to save CPU time when not used Added "spd gset worker_threads" setting, default is 0, which means using half the number of cores. Any number between 1 and the actual number of cores can be set. You MUST use "spd gset worker_threads XXX -save" and restart cFosSpeed, since the number is only used on driver start
  • This selects the number of threads used for data transfer. Higher numbers might improve thruput, but might also lead to short freezes
  • Fixed a very slow handle leak
  • When changing monitor resolution, cFosSpeed will move now its status window to a formerly saved position or the default position. Thanks to John E. G for bug report
  • Sometimes the usage graph didn't allow the selection of elements. Fixed
  • Fix for ProtonVPN and Speedify VPN (and maybe other VPN services as well) the window for the VPN connection is now displayed correctly.
  • Burst code could have selected an unusable pinger. Fixed
  • Fixed a rare, ancient crash when unloading
  • Meta dumps now also include the space method by which traffic is counted. For more info, see collected-data.txt
  • Added debugging aid for a rare bluescreen

New in cFosSpeed 11.11 Build 2510 Beta (Jun 3, 2021)

  • Spd commands "addkey" and "showsect" are available again.
  • Meta dumps now also include the space method by which traffic is counted.
  • For more info, see collected-data.txt.
  • Fixed a very slow handle leak.

New in cFosSpeed 11.11 Build 2509 Beta (May 31, 2021)

  • Webview2 is now statically linked.

New in cFosSpeed 11.11 Build 2508 Beta (May 20, 2021)

  • Newly added programs were always added with "normal" priority. Fixed.
  • When changing monitor resolution, cFosSpeed will move now its status window to a formerly saved position or the default position.

New in cFosSpeed 11.11 Build 2507 Beta (May 18, 2021)

  • Fixed missing "Voive over IP" in new dialogs. Thanks to Michael H.
  • More fixes for the new dialogs. Thanks to Michael H.

New in cFosSpeed 11.11 Build 2506 Beta (May 17, 2021)

  • Fixed a problem in the new dialogs. Thanks to Michael H for bug report.
  • Fixed multiple bugs in dialog where priorities are changed. Thanks to
  • Michael H for pointing us there.

New in cFosSpeed 11.11 Build 2505 Beta (May 11, 2021)

  • Added debugging aid for a rare bluescreen.

New in cFosSpeed 11.11 Build 2504 Beta (Apr 21, 2021)

  • Finally, due to public demand: Added port prioritization to preferences UI. You can specify local and remote ports (both TCP and UDP ports will be matched), either individual ports, a range, or a combination of both. E.g. "80,443,1000:1010" will match ports 80 and 443, and ports 1000-1010.

New in cFosSpeed 11.11 build 2503 Beta (Apr 21, 2021)

  • All port filter expressions (-[sdlr]port, -tcp-[sdlr]port, -udp-[sdlr]port) now accept sections in .ini files as well. This can be mixed with regular port ranges.
  • Commands "addkey" and "showsect" have been renamed to "setkey" and "querysect". "setkey" has a changed sytax. New command "querykey".
  • Fixed downloading of WebView2 installer for Win7.

New in cFosSpeed 11.11 build 2502 Beta (Mar 4, 2021)

  • Sometimes the usage graph didn't allow the selection of elements. Fixed.

New in cFosSpeed 11.11 build 2501 Beta (Mar 4, 2021)

  • The current connections dialogs now "freeze" when closed, to save CPU time when not used.
  • Switched to the new Vue.js version 3 for speed-up.

New in cFosSpeed 11.11 build 2500 Beta (Feb 10, 2021)

  • Much improved dialogs!
  • We completely reworked the cFos Speed configuration dialogs. They now use a comprehensive HTTP API (see https://www.cfos.de/de/cfosspeed/documentation/web-api.htm) and Vue.js and Bootstrap and are thus responsive and easier to maintain. We hope you enjoy the new design! :-)
  • In addition, cFosSpeed can now use Chromium Webview2 to display its dialogs. This means that the new dialogs are displayed in our own window, instead of the default web browser window. This allows for improved visual experience and pre-loading of the HTML / Javascript code.
  • Added "spd gset worker_threads" setting, default is 0, which means using half the number of cores. Any number between 1 and the actual number of cores can be set. You MUST use "spd gset worker_threads XXX -save" and restart cFosSpeed, since the number is only used on driver start. This selects the number of threads used for data transfer. Higher numbers might improve thruput, but might also lead to short freezes.

New in cFosSpeed 11.11 build 2491 Beta (Feb 8, 2021)

  • Completed the fix for the rare, ancient crash when unloading from last build.

New in cFosSpeed 11.11 build 2490 Beta (Jan 28, 2021)

  • Fix for ProtonVPN and Speedify VPN (and maybe other VPN services as well): the window for the VPN connection is now displayed correctly.
  • Burst code could have selected an unusable pinger. Fixed.
  • Removed WebView2 files for now.
  • Fixed a rare, ancient crash when unloading.

New in cFosSpeed 11.09 Build 2483 Beta (Jan 5, 2021)

  • Fixed a handle leak. Many thanks to Tin Yeuk for the report.
  • Fixed a bluescreen if cFosSpeed was used in bridged mode.
  • Added more games to settings.ini.
  • Added CPU speed measurement in "spd ver".
  • Changes for new C++ compiler.

New in cFosSpeed 11.08 Build 2473 (Nov 30, 2020)

  • Fixed erroneous ping ballon on WAN connections.
  • x Fixed a long-standing bug (since 10.59) caused by copying all NDIS information types. Now gset copy_oob = 0 is default. Thanks to Michael B and Andreas B for testing.
  • Added gset oob_bits = 0xffffffff, meaning it's enabled for all supported NDIS information types (currently 1, 8, 9, 11, 12, and 14).

New in cFosSpeed 11.09 Build 2480 Beta (Nov 29, 2020)

  • Fixed a handle leak. Many thanks to Victor for the report.
  • Added CPU speed measurement in “spd ver”.
  • Changes for new C++ compiler.

New in cFosSpeed 11.09 build 2480 (Nov 29, 2020)

  • Fixed a handle leak. Many thanks to Victor for the report.
  • Added CPU speed measurement in "spd ver".
  • Changes for new C++ compiler.

New in cFosSpeed 11.08 Build 2373 (Nov 11, 2020)

  • Fixed erroneous ping ballon on WAN connections. Thanks to Avatar for report and testing.
  • Fixed a long-standing bug (since 10.59) caused by copying all NDIS information types. Now gset copy_oob = 0 is default. Thanks to Michael B and Andreas B for testing.
  • Added gset oob_bits = 0xffffffff, meaning it’s enabled for all supported NDIS information types (currently 1, 8, 9, 11, 12, and 14).

New in cFosSpeed 11.07 Build 2470 Beta (Nov 8, 2020)

  • Set copy_oob = 0. This should fix a long-standing bug (since 10.59). Thanks to Michael B and Andreas B for testing.
  • Added gset oob_bits for testing.
  • Enabled more agressive memory debugging.

New in cFosSpeed 11.06 Build 2462 (Oct 31, 2020)

  • Speed-up for high-speed connections. Now you should get full thruput, even on slower machines. Please report how that works for you.
  • + Added new passthru mode 3; old modes 3 and 4 are now 4 and 5. Added a passthru mode 6, which causes the whole NET_BUFFER_LIST chain to be ignored.
  • + Status window position is now stored with respect to monitor resolution.Thanks to Frank H. for the idea!
  • x Fixed problems with WAN Dial-Up if you had only one of IPv4 and IPv6 connectivity.
  • x Fixed a crash in status window. Thanks to Michael S. for dumps.
  • x Fixed a spurious bluescreen when RX shaping was active. Thanks to Avatar for testing.
  • x Fixed a bluescreen in the 32-bit version.
  • x cFosSpeed accessed RSC structures on NDIS < 6.30, where such structures are not yet supported. This led to all kinds of statistical miscalculations. Fixed.
  • x Fixed wrong average transfer units (spd cons -atu). This is used in rx shaping as well.
  • x Some users experienced mouse hangs while downloading heavily. Now the number of worker threads has been limited to half the number of CPU cores to fix this.
  • x Fixed installation problem on Windows 8.1.
  • x Improved cFosSpeed thruput on Gigabit connections. Thanks to Thomas Q. and all the others for testing.
  • x Default program icon image was always small -- fixed.
  • x Finally fixed spd.exe crash! That bug was ancient, but now it's gone.
  • x Finally fixed hanging downloads with NordVPN when RWIN expansion was used. This turned out to be poor programming of NordVPN's driver. Thanks to Contor for traces and tests.
  • x Fixed dumping of LSO/RSC packets.
  • x Fixed motionless HTML skin window. Thanks to Luis R. for the report.
  • x cFosSpeed will no longer lower the MSS when RWIN expansion is used. This could have resulted in slower downloads on high bandwidth connections. Thanks to Reinhold G. for tests.
  • x Fixed a bluescreen when data was transferred in multiple MDLs. Thanks to Pedro S. for dump file.
  • x Fixed a bluescreen when RWIN expansion was used. Thanks to Johann S. for dump file.
  • Support for Windows 20H2 (version 2009).
  • Added gset copy_oob. It can be disabled for debug purposes.

New in cFosSpeed 11.06 Build 2462 Beta (Oct 30, 2020)

  • Speed-up for high-speed connections. Now you should get full thruput, even on slower machines. Please report how that works for you.
  • Added new passthru mode 3; old modes 3 and 4 are now 4 and 5. Added a
  • passthru mode 6, which causes the whole NET_BUFFER_LIST chain to be ignored.
  • Status window position is now stored with respect to monitor resolution. Thanks to Frank H. for the idea!
  • Fixed problems with WAN Dial-Up if you had only one of IPv4 and IPv6 connectivity.
  • Fixed a crash in status window. Thanks to Michael S. for dumps.
  • Fixed a spurious bluescreen when RX shaping was active. Thanks to Avatar for testing.
  • Fixed a bluescreen in the 32-bit version.
  • cFosSpeed accessed RSC structures on NDIS < 6.30, where such structures are
  • not yet supported. This led to all kinds of statistical miscalculations.
  • Fixed.
  • Fixed wrong average transfer units (spd cons -atu). This is used in rx shaping as well.
  • Some users experienced mouse hangs while downloading heavily. Now the number of worker threads has been limited to half the number of CPU cores to fix this.
  • Fixed installation problem on Windows 8.1.
  • Improved cFosSpeed thruput on Gigabit connections. Thanks to Thomas Q. and all the others for testing.
  • Default program icon image was always small -- fixed.
  • Finally fixed spd.exe crash! That bug was ancient, but now it's gone.
  • Finally fixed hanging downloads with NordVPN when RWIN expansion was used.
  • This turned out to be poor programming of NordVPN's driver. Thanks to
  • Contor for traces and tests.
  • Fixed dumping of LSO/RSC packets.
  • Fixed motionless HTML skin window. Thanks to Luis R. for the report.
  • cFosSpeed will no longer lower the MSS when RWIN expansion is used. This could have resulted in slower downloads on high bandwidth connections.
  • Thanks to Reinhold G. for tests.
  • Fixed a bluescreen when data was transferred in multiple MDLs. Thanks to Pedro S. for dump file.
  • Fixed a bluescreen when RWIN expansion was used. Thanks to Johann S. for dump file.
  • Support for Windows 20H2 (version 2009).
  • Added gset copy_oob. It can be disabled for debug purposes.

New in cFosSpeed 11.05 Build 2460 Beta (Oct 27, 2020)

  • Fixed a crash in status window. Thanks to Michael S. for dumps.

New in cFosSpeed 11.05 Build 2459 Beta (Oct 27, 2020)

  • Recoded query of UDP/TCP connections and added better trace output in case of error.

New in cFosSpeed 11.05 Build 2458 Beta (Oct 23, 2020)

  • Hopefully fixed a spurious bluescreen when RX shaping was active.
  • Fixed bug in window positioning.
  • Added gset copy_oob. It can be disabled for debug purposes.

New in cFosSpeed 11.05 Build 2457 Beta (Oct 6, 2020)

  • Fixed a bluescreen in the 32-bit version.
  • cFosSpeed accessed RSC structures on NDIS < 6.30, where such structures are not supported. This led to all kinds of statistical miscalculations. Fixed.
  • Fixed wrong average transfer units (cons -atu). This is used in rx shaping as well.
  • Fixed "spd perf" headings.

New in cFosSpeed 11.05 Build 2454 Beta (Sep 8, 2020)

  • Status window position is now stored with respect to the monitor resolution.
  • Thanks to Frank H. for the idea!

New in cFosSpeed 11.05 Build 2452 Beta (Aug 22, 2020)

  • Speed-up for high-speed connections. Now they should get full thruput, even on slower machines. Please report how that works for you.

New in cFosSpeed 11.05 Build 2451 Beta (Aug 21, 2020)

  • Hopefully fixed installation problem on Windows 8.1.
  • Improved installer log when installation failes.

New in cFosSpeed 11.05 Build 2449 Beta (Aug 9, 2020)

  • Fixed crash introduced in build 2448.

New in cFosSpeed 11.05 Build 2447 Beta (Jul 31, 2020)

  • Fixed passthru mode 3.

New in cFosSpeed 11.05 Build 2446 Beta (Jul 29, 2020)

  • Fixed the fix from last build. Sometimes cFosSpeed would not open the status window.
  • Default program icon image was always small -- fixed.

New in cFosSpeed 11.05 Build 2444 Beta (Jul 10, 2020)

  • Added new passthru mode 3; old modes 3 and 4 are not 4 and 5.
  • Fixed speed problems with high bandwidth connections (> 400 Mbit/s).

New in cFosSpeed 11.05 Build 2442 Beta (Jul 8, 2020)

  • Fixed dumping of LSO/RSC packets.
  • Fixed motionless HTML skin window. Thanks to Luis R. for the report.
  • Tried to fix speed problem for high bandwidth connections (> 400 mbits/s). Thanks to Reinhold G. for tests. Please test and report if you have this
  • condition.

New in cFosSpeed 11.04 Build 2440 (May 28, 2020)

  • The Adapter Info no longer include adapters that have neither had any traffic nor are purely virtual adapters.
  • Fied a bug when downloading the key with a proy server.
  • Sometimes the HTML dialog files are not properly generated resulting in empty dialogs. While the problem is not yet fied, the net start of cFosSpeed will at least detect that and generate proper dialogs.
  • Sometimes the system would bluescreen when Ethernet plug was pulled. Fied.
  • Improved readability of items in Adapter Info dialog.

New in cFosSpeed 11.03 Build 2439 Beta (May 22, 2020)

  • Fixed a bug when downloading the key with a proxy server.

New in cFosSpeed 11.03 Build 2438 Beta (May 22, 2020)

  • The Adapter Info no longer include adapters that have neither had any traffic nor are purely virtual adapters anyway.
  • Sometimes the HTML dialog files are not properly generated resulting in empty dialogs. While the problem is not yet fixed, the next start of cFosSpeed will at least detect that and generate proper dialogs.
  • Improved readability of items in Adapter Info dialog.

New in cFosSpeed 11.03 Build 2437 Beta (May 15, 2020)

  • Sometimes the system would bluescreen when Ethernet plug was pulled. Fixed.

New in cFosSpeed 11.02 Build 2436 (May 7, 2020)

  • cFosSpeed will now disconnect (and reset all stats, etc.) when your WiFi looses connection or when you pull the Ethernet plug.
  • Much better dumping of packets when task offloading is active.
  • Fixed sending net_talk packets. Was broken in v11.0.
  • Fixed bug in NDIS packet handling. This fixes problems with the Killer network card and others.
  • If a second monitor was used to the right of your main monitor, cFosSpeed could have erroneously closed the window for a fullscreen window on monitor 2. Fixed.
  • Fixed issues in RWIN expansion and DNS TTL patching where checksums were corrupted. Thanks to all the tests and traces I got from Contor, Kasiusz J, Robert K, Vladimir V, BlankFX and Mathias S.
  • Do not handle packets that have a header/data split at an unusual point.
  • Fixed bug in setup where key file is downloaded. This fixes connection problems for users from China. Thanks to Yan, 310856638 and Ziqing for testing and traces.
  • Fixed bug in handling of WAN devices. This prevented some VPNs from working. Thanks to Ralf for testing and traces.
  • Fixed crash in installer.
  • Fixed rare bluescreen. Thanks to gobletfire for kernel dump.
  • Fixed NDIS func_trace output.
  • Support for May 2020 update of Windows 10, version 2004, codename 20H1.
  • Added proper counting of header errors and unsupported header/data split points.
  • Improved readability of NDIS traces.
  • Added more trace output for key download.

New in cFosSpeed 11.01 Build 2435 Beta (May 7, 2020)

  • cFosSpeed will now disconnect (and reset all stats, etc.) when your WiFi loses connection or when you pull the Ethernet plug.
  • Fixed sending net_talk packets. Was broken in v11.0.
  • Fixed bug in NDIS packet handling. Hopefully, this fixes problems with the Killer network card.
  • If a second monitor was used to the right of your main monitor, cFosSpeed could have erroneously closed the window for a fullscreen window on monitor 2. Fixed.

New in cFosSpeed 11.01 Build 2434 Beta (May 6, 2020)

  • Much better dumping of packets when task offloading is active.
  • Fixed issues in RWIN expansion and DNS TTL patching where checksums were corrupted. Thanks to all the tests and traces I got from Contor, kasiusz.j, robert korneluk, Vladimir Varbanov, BlankFX and Mathias Schmitt.

New in cFosSpeed 11.01 Build 2431 (Apr 29, 2020)

  • Fixed crash in installer.
  • Fixed rare bluescreen. Thanks to gobletfire for kernel dump.
  • Hopefully fixed problem with key activation.
  • Added proper counting of header errors and unsupported header/data split points.
  • Improved readability of NDIS traces.

New in cFosSpeed 11.00 Build 2420 (Apr 21, 2020)

  • Extensive re-write of the cFosSpeed core networking code:
  • Special speed-up for pass-through LAN traffic (not traffic shaped)
  • Designed to keep all out-of-band packet info intact, resulting in improved ad hoc VPN compatibility
  • Improved analysis of networking edge cases
  • Support for NDIS header/data split
  • Additional speed improvements of Traffic Shaping path
  • Support for Task Offloading: Checksum Offloading (IP and TCP/UDP), Large
  • Segment Offloading and Receive Segment Coalescing
  • With the new networking code cFosSpeed has only barely noticeable CPU load even at full blast 10 GBit/s LAN traffic!
  • Added a new API to get current connections info, which is 20(!) times faster than the old one.
  • The current connections dialog now displays a CPS history of the last 15 secs.
  • If several routes to the Internet exist simultaneously, cFosSpeed can now use all of them for Traffic Shaping. This is especially useful if you have a balancing setup, e.g., one LAN adapter and one mobile adapter in use at the same time.
  • Added new pingers: UDPv6. This should make cFosSpeed's pings even more stable.
  • Removed "idle" class. Now every connection with set L7-protocol and known program name gets a class assigned right away.
  • Added new "spd gset passthru" modes.
  • All dialog pages are now integrated into the main navigation.
  • Reaction time in RWIN expansion was speeded thus increasing throughput.
  • Changed HTTP requests so they are hopefully more compatible with certain
  • proxies.
  • For click-through-auto mode, you can now configure the time needed to switch
  • off click-through (the time you need to hover the mouse pointer over the
  • cFosSpeed window).
  • Added "spd flush_usage_logs". Speeded "spd flush".
  • To save processing power, the cFosSpeed service now uses routing / address / interface change notifications to monitor route changes instead of a periodic timer.+ Optimized handling of how used programs are tracked and stored. It is now faster and more consistent.
  • Used tech from cFos Personal Net to make the internal web server of the cFosSpeed service more responsive.
  • "spd pcnt" will only work if new flag global_counters is set to 1. Enable it with "spd gset global_counters 1".
  • Added time to "X" type line of metadata dump. This line is printed when a TCP or UDP connection is killed.
  • cFosSpeed can now display a toast notification under Win 10 Build 17763+.
  • A click on the new version update notification leads to our web page, where you can download the installation archive.
  • By default, full screen detections requires that the full screen window is on the same monitor as the cFosSpeed status window. You can change it so full screen is detected even if the full screen window is on a different monitor than the cFosSpeed status window, by setting "per_monitor_fullscreen=0" in the file
  • Added a setting where you can turn off full screen detection if the fullscreen window is not on the same monitor.
  • Added IPv6 support for IPlists. The format is the same as for IPv4, just with IPv6 addresses instead. Since IPv6 addresses contain ':', it is assumed that Protowall format IPlists do not use ':' in the "name" portion. If that becomes a problem, use Emule format instead.
  • cFosSpeed will only use the prefix, i.e., the upper 64 bits of an IPv6 address, since the lower 64 bits are the interface identifier and are entirely local.
  • When the stored password to your license is lost or wrong, the screen that asks for it anew will now also accept your 30-char serial number, if that is how you got your key.
  • Sometimes the language selected at installation time wasn't used in the demon. Likewise, a language change in the daemon would not change the language for the next installation. Fixed.
  • Fixed a condition that could lead to starving TCP connections when RWIN expansion was used.
  • Sometimes packets were leaked if expand_rwin was active, i.e., some packets were never freed. This lead to memory problems and hangs when uninstalling/ reinstalling cFosSpeed. This was a long-standing bug. Fixed.
  • Fixed TCP connection problem on connections without TCP WSCALE if RWIN expansion was enabled.
  • x Fixed bug in bulk detection: if downloading with HTTP, bulk streams would be
  • re-classified as HTTP_C for a short time after each new GET. Fixed.
  • x Fixed "spd tcb <remote wild>". You can specify a wildcard for the remote
  • address:port pair. The wildcard is case-insensitive, IPv6 addresses
  • are in "[]" and IPv6 addresses are written as short as possible (omitting
  • leading zeros and using the "::" abbreviation.
  • x Fixed a long-standing bug in RWIN expansion that could lead to slow
  • connection setups.
  • x When cFosSpeed was transferring lots of data, spd commands and current
  • connections could sometimes answer very slowly. Fixed.
  • x Fixed a display bug in "current connections" which didn't indicate user-
  • changed prio.
  • x Fixed bug which caused 100% load on one core.
  • x Fixed a bug where the cFosSpeed status window would not regard the position
  • of the system taskbar with auto-arrange. Thanks to George H.
  • x Many of the fixes could only be done with help of many friendly users that
  • send traces and dump files, like: ckcampbell1963, aleksxp, a11111135, Daniel
  • Hänel, myfootstep, leozhdan, Priben Kranz, Drool and Contor. Thanks to you
  • all!
  • - RWIN expansion will now by default negotiate windows that allow full blast
  • downloads with an RTT of 200 ms. Change expand_rwin_dest_time if you want
  • a different time.
  • - When allocating memory, only nonpaged memory will now be used. No more
  • allocation and locking of paged memory is performed. This worked only
  • very rarely anyway.
  • - Update to Visual Studio 2019.
  • - Removed variables mtu_limit, data_compression_*, vj_compression_*,
  • fixed_speed and add_overhead_*.
  • - (Re)setting the prio class will now have immediate visual effect, even if
  • there is no data on the connection.
  • - Support for Windows 19H2, November 2019 Update and Windows 19H1 (version
  • 1903).
  • - Removed the option to disable the taskbar icon. You can use the Windows
  • taskbar configuration dialog to hide the taskbar icon if you want.
  • - Removed WMI and keyboard LED support. All variables / values are available
  • via our built-in web server.

New in cFosSpeed 10.59 Build 2416 Beta (Mar 31, 2020)

  • Fixed serious bug in WAN mode. Thanks to ckcampbell1963 for memory dump.
  • Sometimes the language selected at installation time wasn't used in the demon. Likewise, a language change in the daemon would not change the language for the next installation. Fixed.

New in cFosSpeed 10.59 Build 2414 Beta (Mar 20, 2020)

  • Fixed a condition that could lead to starving TCP connections when RWIN expansion was used.
  • Fixed a crash in spd.exe service, this time for real.
  • RWIN expansion will now by default negotiate windows that allow full blast downloads with an RTT of 200 ms. Change expand_rwin_dest_time if you want a different time.
  • Added new "spd gset passthru" modes. So far we had:
  • 0 = switch off passthru mode - data is put through driver.
  • 1 = do as little as possible to hand packets to the next driver.
  • 2 = do all the port handling, but don't analyze or modify packet.
  • Now we add:
  • 3 = tx data: like 1, rx data: like 2.
  • 4 = tx data: like 2, rx data: like 1.
  • Debugging purpose only.

New in cFosSpeed 10.59 Build 2413 Beta (Mar 20, 2020)

  • Fixed a crash in spd.exe service.
  • Fixed a leak of packets if expand_rwin was active.

New in cFosSpeed 10.59 Build 2412 Beta (Mar 17, 2020)

  • Fixed a rare bluescreen.
  • Added memory debugging to find strange crashes.

New in cFosSpeed 10.59 Build 2410 Beta (Mar 16, 2020)

  • Speeded reaction time in RWIN expansion thus increasing throughput.
  • Fixed a bluescreen when fragmented packets where dumped.
  • Fixed TCP connection problem on connections without TCP WSCALE if RWIN
  • Fixed spd adapter_info -json.
  • Dumps will reflect TCP/UDP checksum offloads more correctly.

New in cFosSpeed 10.59 Build 2409 Beta (Mar 12, 2020)

  • Added new pingers: UDPv6. Should make cFosSpeed's pings even more stable.
  • All dialog pages are now integrated into the main navigation.

New in cFosSpeed 10.59 Build 2408 Beta (Mar 6, 2020)

  • Kernel mode pingers and UDP user mode pinger didn't work. Fixed.
  • When task offloading was active and cFosSpeed was dumping, packets would be erroneous decoed as "chksum bad". Fixed.

New in cFosSpeed 10.59 Build 2407 Beta (Mar 5, 2020)

  • Again fixed (the fix from build 2406) erroneous "no ping" error message. Thanks to Daniel Hänel for traces.

New in cFosSpeed 10.59 Build 2406 Beta (Mar 2, 2020)

  • Fixed erroneous "no ping" error message when connecting through dial-up.

New in cFosSpeed 10.59 Build 2405 Beta (Feb 28, 2020)

  • Fixed another bluescreen reported by leozhdan.

New in cFosSpeed 10.59 Build 2403 Beta (Feb 20, 2020)

  • Fixed a bluescreen. Thanks to a11111135 for crash dump.

New in cFosSpeed 10.51 Build 2362 Beta (Feb 12, 2020)

  • Removed "idle" class. Now every connection with set L7-protocol and known program name gets a class assigned right away.
  • Build 2361 still generates a bogus virus detection by Yandex Safebrowsing. All other virus checker from virustotal.com return negative results.

New in cFosSpeed 10.51 Build 2361 Beta (Feb 11, 2020)

  • Build 2360 generated a bogus virus detection by Yandex Safebrowsing. This new build is just to avoid that.

New in cFosSpeed 10.51 Build 2360 Beta (Feb 5, 2020)

  • In the advanced current connection dialog, large numbers are now displayed with separators.
  • Changed HTTP requests so they are hopefully more compatible with certain proxies.
  • Fixed several bugs in dialogs for usage graph and priority settings.
  • Fixed "spd cons -cps" speed display.
  • Fixed "spd tcb <remote wild>". You can specify a wildcard for the remote address:port pair. The wildcard is case-insensitive, IPv6 addresses are in "[]" and IPv6 addresses are written as short as possible (omitting leading zeros and using the "::" abbreviation.

New in cFosSpeed 10.51 Build 2359 Beta (Jan 8, 2020)

  • When cFosSpeed was transferring lots of data, spd commands and current connections could sometimes answer very slowly. Fixed.
  • Fixed memory leak in driver.
  • Fixed UDP connection count.

New in cFosSpeed 10.51 Build 2358 Beta (Dec 20, 2019)

  • Fixed an long-standing bug in RWIN expansion that could lead to slow connection setups.
  • Fixed a display bug in "current connections" which didn't indicate user-changed prio.

New in cFosSpeed 10.51 Build 2357 Beta (Dec 10, 2019)

  • Fixed a rare bluescreen that was introduced in build 2350.

New in cFosSpeed 10.51 Build 2355 Beta (Nov 22, 2019)

  • Fixed prioritization dialog.
  • (Re)setting the prio class will now have immediate visual effect, even if there is no data on the connection.

New in cFosSpeed 10.51 Build 2354 Beta (Nov 21, 2019)

  • Fixed bug which caused 100% load on one core.

New in cFosSpeed 10.51 Build 2353 Beta (Nov 21, 2019)

  • The advanced current connections dialogs now also uses the new, faster API. Connections are now prioritized with regard to the network adapter if multiple adapters are in use. Thanks to MSI for the suggestion.

New in cFosSpeed 10.51 Build 2352 Beta (Nov 21, 2019)

  • For click-through-auto mode, you can now configure the time needed to switch off click-through (the time you need to hover the mouse pointer over the cFosSpeed window). To change that time, set the key click_through_time=<secs> in file %LOCALAPPDATA%cfoscfosspeeduser_data.ini, section [All]. Default is 3 secs. Thanks to leon479959891 for the suggestion.
  • Tried to fix (and failed) sporadic freeze that was introduced in beta 2350.
  • Support for Windows 19H2, November 2019 Update.

New in cFosSpeed 10.51 Build 2351 Beta (Nov 12, 2019)

  • Fixed freeze that was introduced in beta 2350.

New in cFosSpeed 10.51 Build 2344 Beta (Jul 29, 2019)

  • Link speeds were sometimes not properly initialized. Fixed.
  • Route finding trace output had double time stamps. Fixed.
  • Removed WMI and keyboard LED support. All variables / values are available via our built-in web server.

New in cFosSpeed 10.51 Build 2343 Beta (Jul 29, 2019)

  • cFosSpeed can now display a toast notification under Win 10 Build 17763+. Thereby, a new version update notification leads to our webpage, where you can download it.
  • Support for Windows 19H1 (version 1903).

New in cFosSpeed 10.51 Build 2342 Beta (Jul 29, 2019)

  • Fixed "nsclear" and "ns -clear" commands: number of total/max TCP & UDP
  • sessions wasn't properly cleared.
  • Current connections dialog would not start. Fixed. This bug was introduced
  • in beta 2341.

New in cFosSpeed 10.51 Build 2341 Beta (Jul 29, 2019)

  • Updated prioritization list (settings.ini).

New in cFosSpeed 10.51 Build 2340 (Jun 4, 2019)

  • By default, full screen detections requires that the full screen window is on the same monitor as the cFosSpeed status window. You can change it so full screen is detected even if the full screen window is on a different monitor than the cFosSpeed status window, by setting "per_monitor_fullscreen=0" in the file
  • c:unsers<you>appdatalocalcfoscfosspeeduser_data.ini section [All]. Thanks to Ori for the suggestion.
  • Added a setting where you can turn off full screen detection if the fullscreen window is not on the same monitor.
  • Added IPv6 support for IPlists. The format is the same as for IPv4, just with IPv6 addresses instead. Since IPv6 address contain ':' it is assumed that Protowall format IPlists do not use ':' in the "name" portion. If that becomes a problem, use Emule format instead.
  • cFosSpeed will only use the prefix, i.e., the upper 64 bits of an IPv6 address, since the lower 64 bits are the interface identifier, which is entirely local.
  • When the stored passwort to your license is lost or wrong, the screen that asks for it anew will now also accept your 30-char serial number, if that is how you got your key.
  • Fixed a spurious crash if installation failed. Thanks to Drool.
  • Added more games to the prioritization list (settings.ini)

New in cFosSpeed 10.50 Build 2338 (Mar 21, 2019)

  • In the Prioritize Programs dialog you can now select to display the used programs only (instead of all programs).
  • Settings.ini and thereby the list of default program priorities is now
  • Updated automatically. If you don't want this, delete the key named
  • 'version' in the section [All] at the end of the file.
  • There is an option in the program update menu to enable / disable this
  • Automatic update.
  • Install and uninstall now also clean the driver store from cFosSpeed
  • INF files. If an install is still unsuccessful or results in
  • "driver not loaded" problems, you can run the installation, ignore
  • Errors and then run a deinstall. This should clean the driver store from
  • Old cFosSpeed INF files.
  • CFosSpeed now tracks the host name from HTTP, TLS and QUIC conenctions.
  • It can be displayed with "spd cons -host". This will print the host name
  • Instead of the remote address. If you want both, use "-host2" or "-host -remote" instead.
  • Advanced connection overview (and "spd cons" as well) now only keeps one
  • UDP pseudo-connection per DNS server. This prevents a load of UDP DNS
  • Pseudo-connections that were just used for one DNS query.
  • Added installer checkbox to allow us to occasionally (max. once a year!)
  • Collect some anonymous meta data from your connections (we clear out your IP address). This is to help us develop a new and improved form of traffic
  • Class detection. Please switch it on, we need real live traffic data to
  • Develop this new feature.
  • Click-through now has its own sub-menu. You can now chose between "off",
  • "click-through" (always) and "click-through (auto)". In auto mode, the
  • Window will change to click-opaque mode if you hover with your mouse cursor
  • Over it for 4 seconds (and will revert back to click-through mode if the
  • Cursor is not in the window for 4 seconds). So, if the skin window
  • Prevents you from interacting with other windows, you can use the click-
  • Through mode. Thanks to Death_Master for the suggestion.
  • The list of used programs is now updated periodically and not only when the usage graph is opened.
  • Status window positions are now stored per network adapter, regardless of
  • Router MAC. This should eliminate confusion when the network adapter is
  • Used with different routers.
  • Improved usability of the context menu.
  • Advanced connection overview (and "spd cons" as well) is now by default
  • Sorted by protocol (first TCP, then UDP), then by local IP address:port, then remote. IPv4 is sorted in front of IPv6.
  • Added more games and other programs to the program prioritization UI.
  • Fixed and improved sorting in advanced connection overview: column "class"
  • Is now ordered by prio, "prot" by protocol/local/remote and the columns
  • Have a default order that makes sense (i.e., the most important at the top
  • Or alphabetical).
  • The entries in the current connections dialog are now sorted according to
  • Their speed.
  • Skin window position is now stored relative to the nearest corner of the
  • Current monitor. Thereby the position is always fixed relative to that
  • Corner if you change monitor resolution.
  • CFosSpeed now tracks DUPACKs to be able to assess connection quality.
  • "spd ns" has now a row with "Duplicate ACKs".
  • "spd cons" has now rows for tx'ed DUPACKs (an indicator for receive quality)
  • And tx resends (an indicator for transmit quality).
  • "spd cons" now accepts a "-head:<n>" parameter to only print the first
  • <n> connections.
  • Optimized amount of in-flight data that cFosSpeed allows (sort of a global
  • RWIN) for lower ping times. This should lower your ping times by about
  • 30 msec if your are transferring data at the same time.
  • If low latency mode is switched on and non-cooperative mode is selected,
  • CFosSpeed will act as if in cooperative mode, that is, we're trading
  • High bandwidth for low ping time.
  • CFosSpeed's foreground window detection will automaticall grant high prior
  • To data from the current foreground process (as long as it's in the
  • Foreground). This could lead to the case where you upload/download and
  • All that data is set to high, effectively congesting the whole line, even
  • For small high-prio data (like DNS or VoIP).
  • This is now fixed: only non-bulk data from foreground processes is set to
  • High and bulk data is now elevated to normal. That's still better than low,
  • Which is where is would normally go.
  • CFosSpeed version and build numbers are saved to registry to
  • HKLMSOFTWAREcFoscFosSpeed.
  • When using "spd tcb" command you can now add a wildcard to specify which
  • Connection to display, like "spd tcb 8.*:80" or "spd tcb 8.*:*".
  • Added new TCP counter in "spd netstat": Data segments. This will only be
  • Increased if the segment contains any data (i.e. is non ACK-only). It now
  • Allows for a more accurate calculation of resent percentage.
  • Added support for Windows 10 version 1803, a.k.a. Spring Creators Update,
  • A.k.a. Redstone 4.
  • Added L7 detection of certain QUIC packets.
  • Improved evaluation of the User-Agent string for the L7 protocol detection.
  • The L7 protocol data field now contains the HTTP Host header field in
  • Addition to the Content-Type.
  • Improved "spd ports" display.
  • Fixed multiple bugs where the status window didn't re-open after hibernate/
  • Sleep.
  • Fixed a bug where auto-hide on fullscreen hid the status window even if the
  • Fullscreen window was on a different monitor.
  • Fixed a bug in the update of used programs.
  • Actions on buttons in skin windows were disabled. Fixed.
  • Fixed a bug where the program list in the add new program dialog was not
  • Updated correctly. Thanks to Tim M for reporting it.
  • Fixed a very old bug that could lead to a bluescreen in rare circumstances.
  • Thanks to Philippe Bertrand for dump file.
  • Fixed a possible deadlock (freeze).
  • Improved dumping speed.
  • Clicking on the status windows turned off auto-arrange. Pressing ESC while
  • Moving the window did not restore it to the original position. Fixed,
  • Thanks to Kikka.
  • Fixed an old bug that could have lead to erroneous detection or rejection
  • Of RST segments in cFosSpeed.
  • Fixed constant deletion/creation and trace writing if VM virtual adapter
  • Switched his MAC adress on and off constantly.
  • Fixed a spurious problem with opening the browser. Thanks to Stefan
  • Waldmann for bug report.
  • Fixed detection of IPv6 address of router.
  • When using "spd cons" or the advanced connection overview, the sorting will
  • Now sort TCP and UDP connections together.
  • Fixed detecion of UDP protocols.
  • Removed old, long unused code. Removed filter rules -ppp, -mp-header,
  • Mp-begin, -mp-end, -mp-frag, -pppp that were always false anyway (since
  • CFosSpeed would never get PPP frames).
  • Internal modernization of interlocked variables.
  • Tested with Windows 10 Octover 2018 Update, version 1809, codename
  • Redstone 5.
  • New SDK used. This includes mitigation against certain Spectre attacks.
  • Added / corrected several games in prioritization list. Thanks to Sc3ed.
  • Added some trace output to find a problem where LAN ports will open and
  • Close with a frequency of about 10 seconds. If this still happens to you,
  • Please contact us!Switched to new compiler.
  • Traffic Shaping setting is now by default "not cooperative" owing to the
  • Fact that usually there are other non-cFosSpeed clients on the LAN as well
  • (smartphones, consoles, etc.)

New in cFosSpeed 10.27 Build 2336 Beta (Feb 25, 2019)

  • In the Prioritize Programs dialog you can now select to display the used programs only (instead of all programs).
  • settings.ini and thereby the list of default program priorities is now updated automatically. If you don't want this, delete the key named 'version' in the section [All] at the end of the file.
  • The list of used programs is now updated periodically and not only when the usage graph is opened.
  • Fixed problems with the Logitech Display Keyboards introduced in the last beta.

New in cFosSpeed 10.27 Build 2324 Beta (Jun 25, 2018)

  • Improvements for meta data dumping.

New in cFosSpeed 10.27 Build 2323 Beta (Jun 5, 2018)

  • When using "spd tcb" command you can now add a wildcard to specify which connection to display, like "spd tcb 8.*:80" or "spd tcb 8.*:*"
  • Fixed an old bug that could have lead to erroneous detection or rejection of RST segments in cFosSpeed

New in cFosSpeed 10.27 Build 2322 Beta (May 5, 2018)

  • Added new TCP counter in "spd netstat": Data segments. This will only be increased if the segment is non ACK-only. It now allows for a more accurate calculation of resent percentage.
  • More fixes for broken reporting.
  • Fixed meta data dump that was almost never dumping.

New in cFosSpeed 10.27 Build 2321 Beta (May 3, 2018)

  • Fixed constant deletion/creation and trace writing if VM virtual adapter switched his MAC adress on and off constantly.
  • Usage reporting was broken in 10.27.2320. Fixed.

New in cFosSpeed 10.27 Build 2320 Beta (Apr 30, 2018)

  • Added installer checkbox to allow us to occasionally (max. once a year!) collect some anonymous meta data from your connections (we clear out your IP address). This is to help us develop a new and improved form of traffic class detection. Please switch it on, we need real live traffic data to develop this new feature. For a detailed list of collected data, see http://www.cfos.de/collected-data.txt
  • Added new games / programs to the program prioritization settings. Thanks all for your suggestions!
  • Added L7 detection of certain QUIC packets.
  • Improved evaluation of the User-Agent string for the L7 protocol detection.
  • The L7 protocol data field now contains the HTTP Host header field in addition to the Content-Type.
  • Improved "spd ports" display.
  • Fixed a spurious problem with opening the browser.
  • Fixed detection of IPv6 address of router.
  • When using "spd cons" or the advanced connection overview, the sorting will now sort TCP and UDP connections together.
  • Fixed detecion of UDP protocols.
  • Traffic Shaping setting is now by default "not cooperative" owing to the fact that usually there are other non-cFosSpeed clients on the LAN as well smartphones, consoles, etc.)

New in cFosSpeed 10.26 Build 2312 (Feb 19, 2018)

  • Fixed "manual subnet override" feature.
  • Fixed a bug where cFosSpeed LAN port would appear and disappear every minute or so.
  • The link speed of the network adapter is now always the current link speed instead of the maximum link speed
  • All links to www.cfos.de are now using HTTPS
  • Corrected a lot of program classifications in settings.ini and added new popular games to settings.ini, so they can be prioritized by cFosSpeed accordingly. Thank you all for your suggestions in the prioritization dialog
  • Switched to latest compiler

New in cFosSpeed 10.25 Build 2311 Beta (Dec 18, 2017)

  • Added new popular games to settings.ini, so they can be prioritized by cFosSpeed accordingly. Thank you all for your suggestions in the prioritization dialog.

New in cFosSpeed 10.25 Build 2310 Beta (Dec 15, 2017)

  • Fixed a bug where cFosSpeed LAN port would appear and disappear every
  • minute or so. Thanks to stdedos.
  • The link speed of the network adapter is now always the current link speed,
  • instead of the maximum link speed.
  • Switched to latest compiler.

New in cFosSpeed 10.24 Build 2304 (Nov 2, 2017)

  • Tested with Windows 10 Fall Creator's Update, a.k.a. Redstone 3.
  • Fixed the rare bluescreen with code IRQL_UNEXPECTED_VALUE (c8).
  • Removed a now useless check for net_talk when using subnet_override feature.
  • Fixed handling of HTTP response codes 3xx in installer. This should avoid problems with users from esp. China when registering their keys.
  • Changed method of Internet Connection Sharing activation used in Wi-Fi access points so it works again with Microsoft Windows 10 Build 15063 aka Creator's Update).

New in cFosSpeed 10.23 Build 2303 Beta (Oct 19, 2017)

  • Fixed the rare bluescreen with code IRQL_UNEXPECTED_VALUE (c8).
  • Removed a now useless check for net_talk when using subnet_override feature.

New in cFosSpeed 10.23 Build 2302 Beta (Oct 13, 2017)

  • Improved CPU features check.

New in cFosSpeed 10.23 Build 2301 Beta (Sep 14, 2017)

  • Fixed handling of HTTP response codes 3xx in installer. This should avoid problems with users from esp. China when registering their keys.
  • Changed method of Internet Connection Sharing activation used in Wi-Fi access points so it works again with Microsoft Windows 10 Build 15063 (aka Creator's Update).

New in cFosSpeed 10.23 Build 2300 Beta (Aug 1, 2017)

  • Tried to fix a rare bluescreen with code IRQL_UNEXPECTED_VALUE (c8). To enable the fix, set "spd gset raise_irql 1 -save".

New in cFosSpeed 10.22 Build 2290 (Mar 30, 2017)

  • The Metro skin now has a button in the right lower corner to toggle the
  • current speed variables and the new current max speed variables. So you
  • always can check what speed your connection achieved recently.
  • Added curr_max_rx and _tx variables that hold the current line speed, in
  • contrast to maxrx, maxtxacked and maxtxraw that hold the maximum speeds
  • ever achieved. These variables are also available for skins and WMI as
  • curr_rx_scale and curr_tx_scale.
  • The "Add Program" dialog now lets you select between currently used
  • programs and all programs you used.
  • x Fixed empty values in usage graph, thanks to Stef.
  • x Fixed help links in settings dialogs.
  • x Fixed a possible CPU hog in the cFosSpeed service if adapters had empty
  • names.
  • x The "ProgramDatacFoscFosSpeedlogs" sub-directory wasn't created. Fixed.
  • This bug was introduced in v10.15.2281. Thanks to Contor, again. :)
  • x The list of used programs was not properly updated when adding a program to
  • the program priority list. Fixed, thanks to Contor.
  • x Fixed ping statistics dialog.
  • x Fixed a caching problem with the new dialogs. The "restore defaults"
  • button should now work again.
  • x Fixed empty statistics values in the usage graph.
  • Internal changes for upcoming, new product feature. (No, don't ask yet :) )
  • Changed avg_time settings: 2 sec for the PPPoE/A, PPTP, AAL5 and VDSL modes,
  • 4 sec for all others, including adaptive. This setting is the minimum
  • time for speed measurements to calculate max speeds, so it evens out spikes
  • in traffic speed.

New in cFosSpeed 10.21 Build 2289 Beta (Mar 16, 2017)

  • Internal changes for upcoming, new product feature.

New in cFosSpeed 10.21 Build 2288 Beta (Jan 16, 2017)

  • The Metro skin now has a button in the right lower corner to toggle the current speed variables and the new current max speed variables. So you always can check what speed your connection achieved recently
  • Fixed empty values in usage graph, thanks to Stef
  • Fixed help links in settings dialogs

New in cFosSpeed 10.21 Build 2287 Beta (Nov 29, 2016)

  • Added curr_max_rx and _tx variables that hold the current line speed, in contrast to maxrx, maxtxacked and maxtxraw that hold the maximum speeds ever achieved. These variables are also available for skins and WMI as curr_rx_scale and curr_tx_scale.
  • Changed avg_time settings: 2 sec for the PPPoE/A, PPTP, AAL5 and VDSL modes, 4 sec for all others, including adaptive. This setting is the minimum
  • time for speed measurements to calculate max speeds, so it evens out spikes in traffic speed.
  • Fixed a possible CPU hog in the cFosSpeed service if adapters had empty names.

New in cFosSpeed 10.21 Build 2286 Beta (Nov 29, 2016)

  • The "ProgramDatacFoscFosSpeedlogs" sub-directory wasn't created. Fixed. This bug was introduced in v10.15.2281.

New in cFosSpeed 10.21 Build 2285 Beta (Nov 29, 2016)

  • The list of used programs was not properly updated when adding a program to the program priority list. Fixed.

New in cFosSpeed 10.21 Build 2284 Beta (Oct 21, 2016)

  • Fixed ping statistics dialog.

New in cFosSpeed 10.21 Build 2283 Beta (Oct 20, 2016)

  • The "Add Program" dialog now lets you select between currently used programs and all programs you used.
  • Fixed a caching problem with the new dialogs. The "restore defaults" button should now work again.
  • Fixed empty statistics values in the usage graph.

New in cFosSpeed 10.20 Build 2282 (Sep 22, 2016)

  • Drivers are now signed by Microsoft, thus they should work even under the Anniversary Update of Windows 10, version 1607 (Redstone1). Plus they are signed by us with a EV certificate, so Windows SmartScreen always approves them as genuine.
  • Changed the dialogs from HTA to normal HTML. Since they are displayed in the normal browser, they are much faster now.
  • The "Add Program" feature in the program prioritization dialog now only takes .exe files, which are currently used for data transmission. This prevents a lot of .exe files entered into the prioritization which never actually transfer data. As a consequence you need to run the program which you want to prioritize in order to appear in the list.
  • Fixed IP block list handling in new dialogs.
  • Fixed missing text in dialog.
  • Due to browser security, the IP blocklist in the dialog is now hard- coded to blocklist.txt in c:programdatacfoscfosspeed. You can still use other names or directories if you change the user.ini file manually.
  • Switched to Visual Studio 2015 Update 3.

New in cFosSpeed 10.15 Build 2281 Beta (Sep 14, 2016)

  • Fixed a bug in the preferences dialog where Traffic Shaping settings could not be changed with the new dialogs.
  • Fixed IP block list handling in new dialogs.
  • Fixed missing text in dialog.

New in cFosSpeed 10.14 Build 2274 (Jun 29, 2016)

  • Fixed bug in expand_rwin feature for IPv6 against servers that don't support window scaling. Many thanks to Thomas Adamczyk for his help.
  • DNS names are not stored if the query returns an error. This should reduce periodic DNS queries quite a bit.
  • Removed troublesome and old VM detection.
  • Updated performance statistics.

New in cFosSpeed 10.13 Build 2273 Beta (May 25, 2016)

  • Updated performance statistics.

New in cFosSpeed 10.13 Build 2272 Beta (May 9, 2016)

  • Fixed bug in expand_rwin feature for IPv6 against servers that don't support window scaling. Many thanks to Thomas Adamczyk for his help.

New in cFosSpeed 10.13 Build 2271 Beta (Apr 14, 2016)

  • DNS names are not stored if the query returns an error. This should reduce periodic DNS queries quite a bit.
  • Removed troublesome and old VM detection.

New in cFosSpeed 10.12 Build 2262 (Apr 6, 2016)

  • Removed support for Windows XP and Windows Vista. Now, the minimum supported operating system is Windows 7. If you require cFosSpeed for Windows XP or Vista, you can download version 10.10.2238
  • Added a lot of games and other programs to the list of prioritized programs. Thanks to Armor Darks for carefully checking the .exe files
  • cFosSpeed may now remove more expired DNS names from the refresh list
  • New experimental feature: setting "spd gset patch_dns_ttl XXX" enforces a minimum DNS TTL of seconds. This may be useful to prevent constant DNS refreshes of names with very low TTLs
  • cFosSpeed can now distinguish between used and unused domains for the DNS refresh feature
  • Fixed problems with Driver Verifier under Windows 8 and up.
  • Fixed IPV6 DNS detection
  • Used new SHA256 code signing certificate. This should prevent the erroneous
  • SmartScreen warning when installing the downloaded distribution from the web
  • One more fix for a degenerate case in IPv6 packet handling
  • Tried to fix an IPv6 problem where local traffic is not detected as such and erroneously shaped. Thanks Ingo Asche for testing
  • Fixed IPv6 address detection problem when ping_dest was specified only for IPv4. This also caused spd.exe to use up a lot of CPU time.
  • Fixed bugs in IPv6 address detection and improved trace output
  • Fixed a bug in setup
  • Fixed mouse handling of tray icons for Windows 10
  • Fixed a bug in selecting the shared network connection for WiFi access point
  • Fixed display of full line speed in some rare cases
  • Ignore more UPnP bogus bitrates
  • Added trace output and handling for possible spd.exe full throttle problem
  • Restored DNS cache refresh dialog option. DNS cache refresh is now on by default
  • Switched to new Visual Studio 2015 compiler and Windows 10 SDK/WDK
  • Switched off TCP checksumming in cFosSpeed. If you desire, you can switch it back on by using "spd gset checksum_tcp 1 -save", but it is quite time consuming and its use is marginal

New in cFosSpeed 10.11 Build 2260 Beta (Mar 21, 2016)

  • Fixed problems with Driver Verifier under Windows 8 and up

New in cFosSpeed 10.11 Build 2259 Beta (Mar 21, 2016)

  • cFosSpeed may now remove more expired DNS names from the refresh list
  • New experimental feature: setting "spd gset patch_dns_ttl XXX" enforces a minimum DNS TTL of seconds. This may be useful to prevent constant DNS refreshes of names with very low TTLs
  • Fixed IPV6 DNS detection

New in cFosSpeed 10.11 Build 2258 Beta (Mar 2, 2016)

  • Used new SHA256 code signing certificate. This should prevent the erroneous SmartScreen warning when installing the downloaded distribution from the web.

New in cFosSpeed 10.11 Build 2257 Beta (Feb 1, 2016)

  • One more fix for a degenerate case in IPv6 packet handling.

New in cFosSpeed 10.11 Build 2256 Beta (Jan 8, 2016)

  • Tried to fix an IPv6 problem where local traffic is not detected as such and erroneously shaped.

New in cFosSpeed 10.11 Build 2255 Beta (Jan 8, 2016)

  • Fixed IPv6 address detection problem when ping_dest was specified only fo IPv4. This also caused spd.exe to use up a lot of CPU time.

New in cFosSpeed 10.11 Build 2254 Beta (Jan 6, 2016)

  • Added trace output and handling for possible spd.exe full throttle problem.

New in cFosSpeed 10.11 Build 2253 Beta (Dec 23, 2015)

  • Fixed a bug that caused spd.exe to use up one core's full CPU load. That bug was introduced in build 2251.

New in cFosSpeed 10.11 Build 2252 Beta (Dec 21, 2015)

  • Fixed a longstanding bug that caused spd.exe to use up one core's full CPU load.

New in cFosSpeed 10.11 Build 2251 Beta (Dec 19, 2015)

  • Fixed bugs in IPv6 address detection and improved trace output.

New in cFosSpeed 10.11 Build 2250 Beta (Dec 11, 2015)

  • Fixed a bug in setup.

New in cFosSpeed 10.11 Build 2249 Beta (Dec 8, 2015)

  • cFosSpeed can now distinguish between used and unsued domains for the DNS
  • refresh feature.

New in cFosSpeed 10.11 Build 2248 Beta (Nov 18, 2015)

  • Fixed mouse handling of tray icons for Windows 10.
  • Restored DNS cache refresh dialog option. DNS cache refresh is now on by default.

New in cFosSpeed 10.11 Build 2247 Beta (Nov 5, 2015)

  • Switched to new Visual Studio 2015 compiler and Windows 10 SDK/WDK.

New in cFosSpeed 10.11 Build 2246 Beta (Oct 16, 2015)

  • Removed support for Windows XP and Windows Vista. Now, the minimum supported operating system is Windows 7.
  • Switched off TCP checksumming in cFosSpeed. If you desire, you can switch it back on by using "spd gset checksum_tcp 1 -save", but it is quite time consuming and its use is marginal.

New in cFosSpeed 10.11 Build 2245 Beta (Sep 28, 2015)

  • Fixed a bug in selecting the shared network connection for WiFi access point
  • Fixed display of full line speed in some rare cases
  • Ignore more UPnP bogus bitrates

New in cFosSpeed 10.10 Build 2238 (Sep 9, 2015)

  • The DNS cache refresh is now disabled when the DNSCACHE service is not running.
  • Ignored more bogus UPnP rates.
  • Fixed several problems under Windows 10.

New in cFosSpeed 10.09 Build 2237 Beta (Sep 2, 2015)

  • DNS refresh feature is now switched off by default.

New in cFosSpeed 10.09 Build 2236 Beta (Aug 29, 2015)

  • Improvements to diagnostic for service crashes.

New in cFosSpeed 10.09 Build 2235 Beta (Aug 25, 2015)

  • Added diagnostic for service crashes.

New in cFosSpeed 10.09 Build 2234 Beta (Aug 20, 2015)

  • Fixed rare crash when disconnecting
  • Fixed bogus error message when loading

New in cFosSpeed 10.09 Build 2233 Beta (Aug 13, 2015)

  • Added sanity checks for DNS handling.

New in cFosSpeed 10.09 Build 2232 Beta (Aug 1, 2015)

  • Fixed memory leaks.

New in cFosSpeed 10.09 Build 2231 Beta (Jul 29, 2015)

  • Small fixes for DNS refresh feature.

New in cFosSpeed 10.09 Build 2230 Beta (Jul 29, 2015)

  • Protocols IMAP4_C, NNTP_C, POP3_C and SSL_C_BULK are now by default set to "Low" priority, since we count them as volume transfers.

New in cFosSpeed 10.09 Build 2229 Beta (Jul 29, 2015)

  • The DNS cache refresh is now disabled when the DNSCACHE service is not running.

New in cFosSpeed 10.09 Build 2228 Beta (Jun 25, 2015)

  • New Windows 10 builds return an error when uninstalling cFosSpeed. This bug is recognized by Microsoft. In such a case, just uninstall a second time and all in well.

New in cFosSpeed 10.09 Build 2227 Beta (Jun 25, 2015)

  • Uninstallation is now faster.

New in cFosSpeed 10.09 Build 2226 Beta (Jun 13, 2015)

  • DNS name refresh is now on by default. Added an option in the preferences dialog to enable or disable it.
  • Ignored more bogus UPnP rates.
  • Added more trace output for configuration of ICS.

New in cFosSpeed 10.09 Build 2223 Beta (May 13, 2015)

  • Added automatic DNS cache refresh. Commonly used host names are now refreshed, so they are always available if needed. This helps to speed up web surfing and other activities when DNS servers or particular DNS queries are slow. You can use the "spd gset store_dns_names 1" command to activate this feature.
  • Fixed handling of UPnP URLs. Now more UPnP router info can be be handled by cFosSpeed. Also added another workaround for the "1.3mbit" problem.
  • cFosSpeed driver is now started and stopped manually under Windows 10 if the system doesn't do it itself. This should fix update problems people were having.

New in cFosSpeed 10.09 Build 2222 Beta (May 13, 2015)

  • Fixed bug that prevented cFosSpeed from starting under Windows 10.

New in cFosSpeed 10.09 Build 2221 Beta (May 13, 2015)

  • cFosSpeed can now display ping statistics of the last 5 minutes. You can open the Ping Statistics dialog from the cFosSpeed context menu. If you experience lag, you can open the statistics and see if your ping increased in the last minutes.
  • Fixed adapter names with non-Latin characters.
  • Due to user requests we changed the opening of dialog pages back to browser defaults (open in new tab in many cases), instead of forcing a new browser window.

New in cFosSpeed 10.09 Build 2220 Beta (Apr 20, 2015)

  • Fixed RX data duplication issue with VMware. Set "spd gset filter_fix 1" to disable.
  • Fixed load problems under Windows 10 Technical Preview 10049.
  • Sometimes a reinstall does not reinstall the driver (for reasons unknown). The status window will now check that at least the version between driver and daemon match. If not, a reboot should fix the problem.
  • Switched char/wchar conversion from thread to system CP.

New in cFosSpeed 10.08 Build 2216 (Apr 18, 2015)

  • UPnP traffic stats are now only determined for LAN connections.
  • Re-worked UPnP device code to fix a crash and a memory leak.
  • Changed virtual Wi-Fi stop dialog.

New in cFosSpeed 10.07 Build 2210 Beta (Apr 2, 2015)

  • Changed virtual Wi-Fi stop dialog.

New in cFosSpeed 10.06 Build 2206 (Mar 27, 2015)

  • Added more SSDP variants to detect more UPnP capable routers.
  • UPnP support can now be switched on and off in Preferences dialog.
  • Relaxed limiting of max rx/tx rates on basis of UPnP settings. Hopefully this avoids problems with routers that return incorrect bandwidths.
  • Increased the number of possible secondary IPv6 addresses to 32.
  • IPv6 prefix lengths are now checked for range 1 - 128 and a default of 64 is used if the prefix length is out of range.
  • The Virtual Wi-Fi can now be started by cFosSpeed automatically at system start time and when the system is resumed (after sleep, suspend, etc.). Virtual Wi-Fi autostart now waits for one minute for the network to become available. This feature can be activated in the Wi-Fi Access Point menu.
  • Fixed a bug which prevented use of UPnP services in many cases.
  • cFosSpeed will now disconnect and reconnect if it finds itself connected through a new router (i.e. the router MAC changed), even if the interface (i.e. the network card) stayed the same. For example, this happens when your laptop was sleeping and wakes up and connects to a new WLAN.
  • Fixed switching of medium on basis of UPnP discovered medium.
  • Fixed virtual adapter detection.
  • Fixed a several bluescreens and a memory leak.
  • Ignored even more junk speed values reported by modems and NICs.
  • Kademlia protocol is now low, since it is usually used for BitTorrent transfers nowadays.

New in cFosSpeed 10.05 Build 2205 Beta (Mar 21, 2015)

  • Fixed a bug which prevented use of UPnP services in many cases.
  • cFosSpeed will now disconnect and reconnect if it finds itself connected through a new router (i.e. the router MAC changed), even if the interface (i.e. the network card) stayed the same. For example, this happens when your laptop was sleeping and wakes up and connects to a new WLAN.
  • Virtual Wi-Fi autostart sometimes failed when the network was not yet available at start time. Virtual Wi-Fi autostart now waits for one minute for the network to become available.
  • Fixed a bluescreen when unloading.
  • Fixed a memory leak and potential crash when unloading.
  • Ignored even more junk speed values reported by modems and NICs.

New in cFosSpeed 10.05 Build 2204 Beta (Mar 13, 2015)

  • Added more SSDP variants to detect more UPnP capable routers.
  • Increased the number of possible secondary IPv6 addresses to 32.
  • IPv6 prefix lengths are now checked for range 1 - 128 and a default of 64 is used if the prefix length is out of range.

New in cFosSpeed 10.05 Build 2203 Beta (Mar 12, 2015)

  • UPnP support can now be switched on and off in Preferences dialog.
  • Relaxed limiting of max rx/tx rates on basis of UPnP settings. Hopefully this avoids problems with routers that return incorrect bandwidths.
  • Fixed switching of medium on basis of UPnP discovered medium.

New in cFosSpeed 10.05 Build 2202 Beta (Mar 11, 2015)

  • If the virtual WiFi access point is configured to be started on Windows startup it is now also started when the system is resumed (after sleep, suspend, etc.).
  • Kademlia protocol is now low, since it is usually used for BitTorrent transfers nowadays.

New in cFosSpeed 10.05 Build 2201 Beta (Feb 26, 2015)

  • Another attempt to fix virtual adapter detection.
  • Fixed two bluescreens.

New in cFosSpeed 10.05 Build 2200 Beta (Feb 26, 2015)

  • The Virtual Wi-Fi can now be started by cFosSpeed automatically at system start time. This feature can be activated in the Wi-Fi Access Point menu.
  • Fixed virtual adapter detection.

New in cFosSpeed 10.04 Build 2195 (Feb 12, 2015)

  • The Traffic Shaping setup now only shows adapters with supported interfaces, i.e. Ethernet or WWAN.
  • Certain UPnP max downstream/upstream values are now ignored for cable users, like 64, 125 kbytes/s and 1.25, 12.5 and 125 mbytes/s and very small values as well. This workaround should fix the "525k" and "1.3m" bug.
  • You can now change the interval between route change checks by setting routing_check_interval=XX in file global.ini, section [param] with the value in msec as XX. The minimum value is 1000.
  • Fixed missing import for XP. Thanks to Vamp67. Anyway... People, it's time to move on. Upgrade your Windows sometime soon!
  • Installer now displays a message box if the driver installation can only be performed after a reboot.
  • Fixed slowing of VPN connections.
  • Corrected prioritization info for League of Legends.
  • cFosSpeed driver does no longer read its file locations from registry System branch, but from SOFTWARE. This should keep cFosSpeed working even after a Windows upgrade from one major version to the next.

New in cFosSpeed 10.03 Build 2194 Beta (Feb 6, 2015)

  • Fixed missing import for XP.
  • Installer now displays a message box if the driver installation can only be performed after a reboot.

New in cFosSpeed 10.03 Build 2193 Beta (Feb 4, 2015)

  • Fixed slowing of VPN connections.

New in cFosSpeed 10.03 Build 2192 Beta (Feb 4, 2015)

  • The Traffic Shaping setup now only shows adapters with supported interfaces, ie. Ethernet or WWAN.
  • UPnP max upstream/downstream values of 64 kbytes are now ignored for cable users as well.
  • UPnP max upstream/downstream values of 1.25, 12.5 and 125 mbytes and very small values are now ignored.
  • Corrected prioritization info for League of Legends.

New in cFosSpeed 10.03 Build 2191 Beta (Feb 3, 2015)

  • UPnP max upstream/downstream values of 525 kbytes are now ignored for cable users. This workaround should fix the "525k" bug.

New in cFosSpeed 10.03 Build 2190 Beta (Jan 28, 2015)

  • You can now change the interval between route change checks by setting routing_check_interval=XX in file global.ini, section [param] with the value in msec as XX. The minimum value is 1000.
  • cFosSpeed driver does no longer read its file locations from registry System branch, but from SOFTWARE.
  • This should keep cFosSpeed working even after a Windows upgrade from one major version to the next.

New in cFosSpeed 10.02 Build 2180 (Jan 23, 2015)

  • Fixed UPnP line speed evaluation for dsl-forum routers.
  • Sometimes the cFosSpeed directory under Program Files wasn't deleted. Fixed.
  • Fixed bluescreen.
  • Added new version check if a crash is detected.

New in cFosSpeed 10.00 Build 2173 (Jan 20, 2015)

  • cFosSpeed now uses another API to get information about routing interfaces. You may need to configure your Traffic Shaping settings in the Options -> Settings -> Preferences Traffic Shaping settings. We hope to address conflicts with other network components with this change.
  • In "spd speed" and in Options/Settings/Adapter Info only volumes are in binary units, i.e. K=1024, M=1048576, G=1073741824, etc. Speeds are displayed in decimal units, i.e. K=1000, etc. This is more like today's convention.
  • Added UPnP discovery of router speeds. Use "spd gset router_info 0 -save" to disable or in file c:\programdata\cfos\cfosspeed\global.ini, section [param] set key router_info=0.
  • Router speed info helps to find the real line speeds quicker. Speed values are displayed on "spd speed" under "router=". If the medium of your Internet connection is detected and cFosSpeed's medium setting is still on "Adaptive",it is changed accordingly.
  • The values of maxrx, maxtxacked and maxtxraw are checked against the router provided values. If cFosSpeed's values are too high, they are limited to the ones provided by the router.
  • Windows 10 tested.
  • If the network class installer is locked by another program, the cFosSpeed installer now displays the culprit.
  • Added "spd slot show" and "spd slot reset" commands.
  • The current connections dialog now displays the program icon. Also the '+' and '-' buttons highlight to make it clearer that you can temporarily change the priority.
  • Improved Layer-7 DNS detection for IPv6. Thanks to Ale for the dumps.
  • Under rare circumstances (e.g. with teaming) cFosSpeed sent packets to the wrong adapter.
  • Fixed several crashes and bluescreens.
  • Fixed flickering context menu on right-click.
  • Fixed a longstanding, yet rare bug that caused a bluescreen if RWIN expansion was active.
  • Fixed bogus string evaluation of network card name.
  • Fixed an spd.exe service crash in the UPnP device detection. This should also fix the problem with non-functioning current connections dialog.
  • Expiration pop-ups came up with every start. Fixed.
  • Fixed a bug in setting up Internet Connection Sharing while creating a wireless access point for Virtual Wi-Fi.
  • Window auto arrange is no longer done when window positions are locked.
  • Fixed a bug where the LAN adapter link speeds where not properly handled.
  • Fixed adapter speed displays. Now proper bytes/s values are displayed (instead of bit/s).
  • Fixed load of assert_crash_bugchecks variable.
  • Included taskbar icons with better resolution for high-res displays.
  • Skin updates.
  • The service spd.exe will now automatically restart if crashed. If you want to stop it, you need to use the "sc stop cfosspeeds" (that's "cfosspeed" with an "s") command from an admin console.
  • Burst can now be aborted by setting "spd gset auto_burst 0" or by disabling Traffic Shaping.
  • Increased trace.txt buffers.
  • cFosSpeed will not modify network bindings anymore, regardless of the Traffic Shaping settings. If you want to unbind cFosSpeed from a certain network card, you can do this in the standard Windows adapter settings dialogs.
  • Improved resilience against other filter drivers messing up cFosSpeed's area in NDIS packets.
  • Internal changes of library use.
  • Now "spd speed" fits into 80 chars window width.
  • Debugging through "spd gset assert_crash_bugchecks" is now possible.

New in cFosSpeed 9.65 Build 2172 Beta (Jan 15, 2015)

  • Fixed a problem with "Next" button for de-installation.

New in cFosSpeed 9.65 Build 2171 Beta (Jan 15, 2015)

  • If your router supports UPnP, the values of maxrx, maxtxacked and maxtxraw are checked against the router provided values. If our values are too high, they are limited to the ones provided by the router.
  • When uninstalling the program, clicking "Next" on the welcome screen had no effect.

New in cFosSpeed 9.65 Build 2170 Beta (Jan 10, 2015)

  • Included taskbar icons with better resolution for high-res displays.

New in cFosSpeed 9.65 Build 2169 Beta (Dec 30, 2014)

  • Under rare circumstances (e.g. with teaming) cFosSpeed sent packets to the wrong adapter.

New in cFosSpeed 9.65 Build 2168 Beta (Dec 30, 2014)

  • Hopefully fixed rare bluescreen.

New in cFosSpeed 9.65 Build 2167 Beta (Dec 19, 2014)

  • Fixed SOAP request encoding.
  • Skin updates.

New in cFosSpeed 9.65 Build 2166 Beta (Dec 17, 2014)

  • Fixed a rare hang in speedsrv.dll.
  • The service spd.exe will now automatically restart if crashed. If you want to stop it, you need to use the "sc stop cfosspeeds" (that's "cfosspeed" with an "s") command from an admin console.

New in cFosSpeed 9.65 Build 2165 Beta (Dec 9, 2014)

  • Fixed bluescreen introduced in build 2161.

New in cFosSpeed 9.65 Build 2164 Beta (Dec 4, 2014)

  • Fixed flickering context menu on right-click.

New in cFosSpeed 9.65 Build 2163 Beta (Nov 29, 2014)

  • Again: hopefully fixed a longstanding, yet rare bug that caused a bluescreen if RWIN expansion was active.
  • Fixed bogus string evaluation of network card name.
  • Burst can now be aborted by setting "spd gset auto_burst 0" or by disabling Traffic Shaping.

New in cFosSpeed 9.65 Build 2162 Beta (Nov 29, 2014)

  • Fixed a bluescreen introduced in build 2161.
  • Increased trace.txt buffers.

New in cFosSpeed 9.65 Build 2161 Beta (Nov 22, 2014)

  • UPnP device info is now cached to improve access to "unreliable" UPnP devices.
  • Hopefully fixed an longstanding, yet rare bug that caused bluescreens if RWIN expansion was active.

New in cFosSpeed 9.65 Build 2160 Beta (Nov 22, 2014)

  • If UPnP router detection detects the medium of your Internet connection and cFosSpeed's medium setting is still on "Adaptive", it is now changed accordingly.

New in cFosSpeed 9.65 Build 2159 Beta (Nov 22, 2014)

  • Changed name of key to disable UPnP router detection: set key router_info=0 in file c:\programdata\cfos\cfosspeed\global.ini, section [param] or use "spd gset router_info 0 -save".
  • Again: Fixed an spd.exe service crash in the UPnP device detection. This should also fix the problem with non-functioning current connections dialog.

New in cFosSpeed 9.65 Build 2158 Beta (Nov 15, 2014)

  • cFosSpeed now uses another API to get information about routing interfaces. You may need to configure your Traffic Shaping settings in the Options -> Settings -> Preferences Traffic Shaping settings.
  • You can now disable UPnP router detection by setting the key detect_igd=0 in file c:\programdata\cfos\cfosspeed\global.ini, section [param].
  • Fixed an spd.exe service crash in the UPnP device detection. This should also fix the problem with non-functioning current connections dialog.
  • Expiration pop-ups came up with every start. Fixed.
  • cFosSpeed will not modify network bindings anymore, regardless of the Traffic Shaping settings. If you want to unbind cFosSpeed from a certain network card, you can do this in the standard Windows adapter settings dialogs.
  • Improved resilience against other filter drivers messing up cFosSpeed's area in NDIS packets.

New in cFosSpeed 9.65 Build 2157 Beta (Nov 8, 2014)

  • Fixed a crash in router speed detection.
  • If the network class installer is locked by another program, the cFosSpeed installer now displays the culprit.
  • Added "spd slot show" and "spd slot reset" commands.

New in cFosSpeed 9.65 Build 2156 Beta (Nov 8, 2014)

  • Fixed UPnP router speed detection.

New in cFosSpeed 9.65 Build 2155 Beta (Nov 8, 2014)

  • Fixed another crash in the service when the program icon info could not be obtained.

New in cFosSpeed 9.65 Build 2154 Beta (Oct 29, 2014)

  • Fixed hanging service.

New in cFosSpeed 9.65 Build 2153 Beta (Oct 29, 2014)

  • Fixed load problem under Windows XP due to GetIconInfoEx.

New in cFosSpeed 9.65 Build 2152 Beta (Oct 24, 2014)

  • UPnP router speed values are displayed on "spd speed" under "router="
  • The current connections dialog now displays the program icon. Also the '+' and '-' buttons highlight to make it clearer that you can temporarily change the priority.
  • Window auto arrange is no longer done when window positions are locked.
  • Internal changes of library use.

New in cFosSpeed 9.65 Build 2151 Beta (Sep 2, 2014)

  • Fixed load of assert_crash_bugchecks variable

New in cFosSpeed 9.65 Build 2150 Beta (Sep 2, 2014)

  • Debugging through "spd gset assert_crash_bugchecks" is now possible

New in cFosSpeed 9.64 Build 2144 (Jul 22, 2014)

  • Added VDSL as medium. Setting this and switching on MTU optimization could result in a 2% speed increase.
  • Connections with protocols UNKNOWN and UNKNOWN_BULK are first matched against program names and only afterwards against protocols. Thus, if no proper protocol is detected, program prios take over (if possible, that is, if the program is listed and its prio is != normal) and only if those don't match, then protocol prio is used (but again, only if that is not set to normal).
  • Fixed a bluescreen when sleeping/waking up.
  • Fixed bug in TCP MSS optimization. This could have fixed a bug in bulk detection as well.
  • Hopefully fixed a bluescreen while deinstalling.
  • Removed install warning with Qihoo 360safe and newer products.
  • Changed headings and switches in "spd cons" from mss/lss/ass to mtu/ltu/atu, since they now show IP-agnostic values (MTU is TCP segment size minus TCP/IP header length, which is different in IPv4 and IPv6).

New in cFosSpeed 9.63 Build 2143 Beta (Jul 21, 2014)

  • Fixed missing import under Windows XP.

New in cFosSpeed 9.63 Build 2142 Beta (Jul 10, 2014)

  • Fixed a bluescreen when sleeping/waking up.

New in cFosSpeed 9.63 Build 2141 Beta (Jun 25, 2014)

  • Removed install warning with Qihoo 360safe and newer products.
  • Added VDSL medium in GUI.
  • Fixed the fix: "spd gset filter_fix 1" now no longer breaks VPN connections.

New in cFosSpeed 9.63 Build 2140 Beta (Jun 11, 2014)

  • Added VDSL as medium. Setting this and switching on MTU optimization could result in a 2% speed increase.
  • Connections with protocols UNKNOWN and UNKNOWN_BULK are first matched against program names and only afterwards against protocols. Thus, if no proper protocol is detected, program prios take over (if possible, that is, if the program is listed and its prio is != normal) and only if those don't match, then protocol prio is used (but again, only if that is not set to normal).
  • Fixed bug in TCP MSS optimization. This could have fixed a bug in bulk detection as well.
  • Hopefully fixed a bluescreen while deinstalling.
  • Changed headings and switches in "spd cons" from mss/lss/ass to mtu/ltu/atu, since they now show IP-agnostic values (MTU is TCP segment size minus TCP/IP header length, which is different in IPv4 and IPv6).

New in cFosSpeed 9.62 Build 2135 (Jun 3, 2014)

  • Added foreground window detection: connections of the window in foreground automatically have high priority. You can switch off this feature by the "spd gset fg_detect 0 -save" command.
  • Added setup for an WiFi access point. Windows 7 and above can use your WiFi/WLAN adapter as an ad hoc WiFi access point, so other devices can connect to your Windows 7/8/8.1 PC. In combination with cFosSpeed, these devices can benefit from cFosSpeed Traffic Shaping. If your PC is connected to the router via WiFi/WLAN, you can share the same adapter for the ad hoc WiFi access point. Or you can use the WiFi adapter exclusively for the WiFi access point if your PC is connected to the router via network cable.
  • cFosSpeed now has additional context menu option to activate / stop the WiFi access point.
  • cFosSpeed now detects and records HTTP content-types and SSL TLS server names. The command "spd cons -data" can show them.
  • Right-click on an icon skin wouldn't start the context menu. Fixed.
  • Web server startup could have delayed the speed service startup. Fixed.
  • Fixed a bug that caused packet duplication in Wireshark and with VMware in bridged network card mode. Maybe this bug also fixes problems encountered with Kaspersky Anti-Virus. This fix can be disabled with the command "spd gset filter_fix 0 -save". The count of filtered packets is printed with the "spd fcstat" command. Please report if this works.
  • Tried to fix a rare bluescreen.
  • The saved window position is now used if at least one corner of the window is visible on one monitor.
  • Fixed a bluescreen when port was opened/closed.
  • Fixed a bug under Win XP where the current connections dialog produced an error when started from the skin window.
  • Fixed bluescreen in TLS protocol detection.
  • Changed context menu internals.

New in cFosSpeed 9.61 Build 2134 Beta (Jun 2, 2014)

  • Added foreground window detection: connections of the window in foreground automatically have high priority. You can switch off this feature by the "spd gset fg_detect 0 -save" command.
  • Added setup for an WiFi access point. Windows 7 and above can use your WiFi/WLAN adapter as an ad hoc WiFi access point, so other devices can connect to your Windows 7/8/8.1 PC. In combination with cFosSpeed, these devices can benefit from cFosSpeed Traffic Shaping. If your PC is connected to the router via WiFi/WLAN, you can share the same adapter for the ad hoc WiFi access point. Or you can use the WiFi adapter exclusively for the WiFi access point if your PC is connected to the router via network cable. cFosSpeed now has additional context menu option to activate / stop the WiFi access point.
  • Right-click on an icon skin wouldn't start the context menu. Fixed.
  • Webserver startup could have delayed the speed service startup. Fixed.

New in cFosSpeed 9.61 Build 2133 Beta (May 27, 2014)

  • Fixed a bug that caused packet duplication in Wireshark and with VMware in bridged network card mode. Maybe this bug also fixes problems encountered with Kaspersky Anti-Virus. This fix can be disabled with the command "spd gset filter_fix 0 -save". The count of filtered packets is printed with the "spd fcstat" command.

New in cFosSpeed 9.61 Build 2132 Beta (May 20, 2014)

  • Tried to fix a rare bluescreen.
  • Next try to fix the duplicate menu entries for some users.

New in cFosSpeed 9.61 Build 2131 Beta (May 14, 2014)

  • The saved window position is now used if at least one corner of the window is visible on one monitor.
  • Fixed a bluescreen when port was opened/closed. Thanks to cloverdew.
  • Changed context menu internals. If you had problem with context menu in the past, please test again.

New in cFosSpeed 9.61 Build 2130 Beta (May 7, 2014)

  • Fixed a bug under Win XP where the current connections dialog produced an error when started from the skin window.
  • Fixed bluescreen in TLS protocol detection.

New in cFosSpeed 9.60 Build 2114 (Apr 30, 2014)

  • cFosSpeed now supports IPv6. IPv6 traffic is displayed in the status window, and RWIN expansion, shaping, filters, ping latency measurement and firewall all support IPv6. GUI and CUI output has been adapted to longer IPv6 addresses.
  • Added Phone-Skin support. You can now access the cFosSpeed status window from other devices within your LAN via HTTP. For example open the webpage http://192.168.2.100:1487/cfosspeed/index.htm from your smartphone or tablet to access the cFosSpeed status (assuming your local IP address is 192.168.2.100). This is especially useful in fullscreen mode, when you play a game or watch a video. Phone-Skin support keeps you informed about your network activity even when the normal cFosSpeed status window is not visible.
  • If you try it with the browser on your local machine, no username/pwd is needed. From other machines, the user name is "cfosspeed" and the password can be setup by specifying the server_password= key in the file c:\programdata\cfos\cfosspeed\global.ini, section [All]. Use ! as first letter. That will cause it to be encrypted on first use.
  • You can also open the Current Connections dialog from your phone or tablet and view or prioritize individual connections. Use this URL on your phone or tablet: http://[Your IP address]:1487/cfosspeed/console.htm
  • The advanced current connections dialog now displays the RTT for TCP connections.
  • Added "spd filter_call_stats" for counting of NDIS 6 filter driver calls and "spd filter_call_stats_clear" or "spd fcsclear" to clear them.
  • Added Layer 7 SRTP detection for SSL connections. If your Voice over IP connection is encrypted with SSL, cFosSpeed can now detect this and prioritize accordingly.
  • In preparation for the upcoming HTTP/2.0 standard, we improved Layer 7 SSL SPDY detection. This also reduces false positives.
  • Skin Windows can now also auto-arranged at the top right corner of the screen. You can select this in the "Window settings" menu.
  • Added three more columns to "spd perf" output for debugging.
  • New current connection dialogs.
  • Your local IP addresses are now displayed in the context menu.
  • Improved Layer-7 detection of HTTP based protocols, e.g. most of the streaming protocols.
  • FosSpeed now tries to detect MPEG transport streams.
  • Added Google SPDY detection in SSL, classified as SSL_SPDY_C or SSL_SPDY_S (client or server). Since the browsers which use SPDY prioritize different HTTP streams according to their content, cFosSpeed prioritizes it as normal.
  • Added TLS 1.2 protocol detection, classified as SSL_C or SSL_S (client or server).
  • MPEG DASH is now a separate L7 protocol and (as HSTREAM_C) prioritized high.
  • Added -ipv4, -ipv6 rules.
  • Added -icmpv6-type rule that only matches IPv6 packets.
  • Re-introduced avg. segment size display in "spd cons". Use "spd cons -ass"
  • Improved "spd -tcpview" output.
  • MPEG Dash is now detected if the content-type is either "text" or "application/...".
  • Added support for Windows 8.1.
  • Improved stream detection for Youtube. They are using MPEG Dash and report the content-type as text. So cFosSpeed now tries to look into the first few bytes of the HTTP body to detect video streams.
  • From the data we see in the crash reports you send us, we see a lot of crashes caused by viruses or malfunction of security software. So from now on the crash handler will try to report if the crash was caused by a virus or malfunctioning software (which installs "hooks"). So you can take measures to increase system stability, e.g. clean your system, update your security software, etc.
  • Added new "spd gset dump_sessions 5": delete dump file if no RWIN expansion took place.
  • If the number of connections is exhausted, cFosSpeed will no longer fill the trace file with error messages.
  • Now the completely new Russian translation is actually included!
  • Fixed bug that caused long DPC execution times and thus could cause stuttering in music playback.
  • Fixed broken window lock feature.
  • Fixed a bug where window position would not remembered correctly.
  • All spd commands were a bit slow in responding, since trace.txt was always flushed to disk. That bug was introduced in v9.03.2042. Fixed.
  • Fixed a bug with window positions, when no previous position was given.
  • Improved the way multiple skin windows are auto-arranged.
  • Fixed a rare crash when displaying current connections.
  • The Current Connections dialog would not start under XP when skin button was used. Fixed.
  • Worked around some problem with overwriting files after installation. This lead to unavailable dialogs.
  • Fixed a bug which caused incorrect UDP connections to be selected in the advanced connections dialog.
  • Fixed changing the medium under Preferences / Currect Connection and "spd set medium" command.
  • Fixed bug for "Direct" functions in NDIS 6.2.
  • Fixed missing status window under Windows XP for WAN connections.
  • Fixed floating point problem that caused bluescreen.
  • Fixed faulty lowering of statistical max. rx-speed when port was opened.
  • Fixed a bug in RWIN expansion that caused TCP streams to stop.
  • Fixed half-open session counter after "spd ns".
  • Fixed version checker that queried for new versions too often.
  • Fixed "spd ns" and "spd nsclear".
  • Hopefully fixed a rare bluescreen where cFosSpeed ran out of kernel stack space, if RWIN expansion was enabled.
  • Fixed a bug in RWIN expansion that caused downloads to hang.
  • Fixed a blue screen in cFosSpeed that sometimes occurred when cFosSpeed went to sleep.
  • Fixed crashes in speedsrv.dll, while installing, in prioritization dialog, in status window and a bluescreen.
  • If no content-type was found in the windows registry, cFosSpeed now uses some default mime types for the most common document types. This should help in cases where the new *.htm dialogs were not displayed, but the browser offered to save them, instead.
  • cFosSpeed console no longer requests Admin privileges.
  • SSL_C_BULK now has priority 'normal', because many video streams use SSL nowadays.
  • Added new state 8 (at least one FIN-ACK) for -tcp-session rule.
  • The msslimit variable has been removed and replaced by the mtu_limit variable. In IPv4 MTU = MSS+40, so if you had msslimit set to 1400, you want to set mtu_limit now to 1440.
  • The "spd stat_infos" command has been renamed to "spd port_stats".
  • "Open cFosSpeed console" is now available as well in the context menu under Traffic Shaping, since Win8 doesn't offer the start menu any more.
  • Added "enter serial number" to start and context menu. This only applies to users who have a 30-digit serial number.
  • Added more trace output to dump.txt file.

New in cFosSpeed 9.05 Build 2113 Beta (Apr 26, 2014)

  • Temporary removed the status window in Metro mode, because it interferes with the settings dialogs.

New in cFosSpeed 9.05 Build 2112 Beta (Apr 25, 2014)

  • Fixed netconfig output.
  • Added more trace output.

New in cFosSpeed 9.05 Build 2111 Beta (Apr 24, 2014)

  • The cFosSpeed status window now also appears in the Metro apps and the Metro start menu. Also added a new context menu option where you can turn it off.
  • Added trace output.

New in cFosSpeed 9.05 Build 2110 Beta (Apr 16, 2014)

  • Hopefully fixed bluescreen.

New in cFosSpeed 9.05 Build 2109 Beta (Apr 11, 2014)

  • The advanced current connections dialog now displays the RTT for TCP connections.
  • Added "spd filter_call_stats_clear" or "spd fcsclear" to clear NDIS 6 filter driver calls stats.
  • Improved "spd filter_call_stats" output.
  • If no content-type was found in the windows registry, cFosSpeed now uses some default mime types for the most common document types. This should help in cases where the new *.htm dialogs were not displayed, but the browser offered to save them, instead. Thanks to Barthez.
  • cFosSpeed console no longer requests Admin privileges.
  • Fixed broken skin.htm dialog.

New in cFosSpeed 9.05 Build 2108 Beta (Apr 2, 2014)

  • Added Layer 7 SRTP detection for SSL connections. If your Voice over IP connection is encrypted with SSL, cFosSpeed can now detect this and prioritize accordingly.
  • In preparation for the upcoming HTTP/2.0 standard, we improved Layer 7 SSL SPDY detection. This also reduces false positives.
  • Fixed trace file handling: trace files were not flushed properly. This bug was introduced in build 2104.
  • Fixed bug that caused long DPC execution times and thus could cause stuttering in music playback.

New in cFosSpeed 9.05 Build 2107 Beta (Mar 29, 2014)

  • Fixed broken window lock feature

New in cFosSpeed 9.05 Build 2106 Beta (Mar 26, 2014)

  • Added "spd filter_call_stats" for counting of NDIS 6 filter driver calls

New in cFosSpeed 9.05 Build 2104 Beta (Mar 20, 2014)

  • Fixed missing import under XP.
  • All spd commands were a bit slow in responding, since trace.txt was always flushed to disk. That bug was introduced in v9.03.2042 and could cause stuttering in music playback. Fixed. Thanks to Ben Yee Hua.
  • Fixed a bug with window positions, when no previous position was given.
  • SSL_C_BULK now has priority 'normal', because many video streams use SSL nowadays.

New in cFosSpeed 9.05 Build 2103 Beta (Mar 15, 2014)

  • Skin Windows can now also auto-arranged at the top right corner of the screen. You can select this in the "Window settings" menu.
  • Improved the way multiple skin windows are auto-arranged.

New in cFosSpeed 9.05 Build 2102 Beta (Mar 11, 2014)

  • Fixed a rare crash when displaying current connections.

New in cFosSpeed 9.05 Build 2101 Beta (Mar 11, 2014)

  • Added three more columns to "spd perf" output for debugging.
  • Fixed error in Current Connections dialog with no connections.
  • Fixed a problem where newer versions of the dialog could not overwrite older versions.

New in cFosSpeed 9.05 Build 2100 Beta (Feb 19, 2014)

  • Hopefully fixed a crash in speedsrv.dll.
  • Our firewall wasn't adapted to IPv6. Fixed.

New in cFosSpeed 9.05 Build 2099 Beta (Feb 15, 2014)

  • In addition to the phone skins: You can now also open the Current Connections dialog from your phone or tablet and view or prioritize individual connections.
  • The Current Connections dialog would not start under XP when skin button was used. Fixed.
  • Fixed a rare crash.

New in cFosSpeed 9.05 Build 2098 Beta (Feb 13, 2014)

  • Worked around some problem with overwriting files after installation. This lead to unavailable dialogs.
  • Fixed start of console.htm.
  • Fixed display bugs in the advanced connections dialog.

New in cFosSpeed 9.05 Build 2097 Beta (Feb 8, 2014)

  • New current connection dialogs.
  • The built-in webserver can now retrieve the current connection list and issue spd commands. This will be used in the current connection dialogs.
  • Fixed rare crash when installing.
  • Hopefully fixed a crash with dial-up and IPv6.

New in cFosSpeed 9.05 Build 2096 Beta (Feb 3, 2014)

  • Fixed temporary priorization and "spd prio ..." command for IPv6 addresses.
  • Fixed a bug which caused incorrect UDP connections to be selected in the advanced connections dialog.

New in cFosSpeed 9.05 Build 2094 Beta (Jan 23, 2014)

  • Your local IP addresses are now displayed in the context menu.
  • For phone skins, cFosSpeed now opens a port (usually 1487) in the Windows firewall on start and closes it on exit.
  • Fixed changing the medium under Preferences / Currect Connection and "spd set medium" command.
  • Fixed bug for "Direct" functions in NDIS 6.2.

New in cFosSpeed 9.05 Build 2093 Beta (Jan 14, 2014)

  • Improved Layer-7 detection of HTTP based protocols, e.g. most of the streaming protocols.
  • Fixed crash in priorization dialog.

New in cFosSpeed 9.05 Build 2092 Beta (Jan 11, 2014)

  • Fixed rare crash of status window.

New in cFosSpeed 9.05 Build 2091 Beta (Jan 7, 2014)

  • cFosSpeed now tries to detect MPEG transport streams

New in cFosSpeed 9.05 Build 2090 Beta (Dec 20, 2013)

  • Added Smartphone-Skin support. You can now access the cFosSpeed status window from other devices within your LAN via HTTP. For example open the webpage http://192.168.2.100:1487/cfosspeed/index.htm from your smartphone to access the cFosSpeed status (assuming your local IP address is 192.168.2.100). This is especially useful in fullscreen mode, when you play a game or watch a video. Smartphone-Skin support keeps you informed about your network activity even when the normal cFosSpeed status window is not visible.
  • If you try it with the browser on your local machine, no username/pwd is needed. From other machines, the user name is "cfosspeed" and the password can be setup by specifying the server_password= key in the file c:\programdata\cfos\cfosspeed\global.ini, section [All]. Use ! as first letter. That will cause it to be encrypted on first use.

New in cFosSpeed 9.05 Build 2089 Beta (Dec 12, 2013)

  • Fixed temporary prioritization of IPv6 connections.
  • Fixed temporary prioritization of UDP connections.

New in cFosSpeed 9.05 Build 2088 Beta (Dec 12, 2013)

  • Added google SPDY detection in SSL, classified as SSL_SPDY_C or SSL_SPDY_S (client or server). Since the browsers which use SPDY prioritize different HTTP streams according to their content, cFosSpeed prioritizes it as normal.
  • Added TLS 1.2 protocol detection, classified as SSL_C or SSL_S (client or server).
  • MPEG DASH is now a separate L7 protocol and (as HSTREAM_C) prioritized high.
  • Fixed display bug with IPv4/v6 dial-up.

New in cFosSpeed 9.05 Build 2087 Beta (Nov 26, 2013)

  • Fixed display bug with IPv4/v6 dial-up.

New in cFosSpeed 9.05 Build 2084 Beta (Nov 20, 2013)

  • Another IPv4/v6 dial-up fix for Win8

New in cFosSpeed 9.05 Build 2082 Beta (Nov 16, 2013)

  • More IPv4/v6 dial-up fixes.

New in cFosSpeed 9.05 Build 2081 Beta (Nov 13, 2013)

  • Hopefully now really fixed the IPv4/v6 dial-up (WAN) problem.

New in cFosSpeed 9.05 Build 2080 Beta (Nov 8, 2013)

  • Fixed missing status window under Windows XP for WAN connections.
  • Fixed floating point problem that caused bluescreen.
  • Removed "missing DLLs" again, they were not needed.

New in cFosSpeed 9.05 Build 2079 Beta (Oct 22, 2013)

  • Fixed bug in IPv6 WAN adapter detection.
  • Fixed missing DLL for Windows 8.1

New in cFosSpeed 9.05 Build 2078 Beta (Oct 9, 2013)

  • Improved trace output.

New in cFosSpeed 9.05 Build 2077 Beta (Oct 8, 2013)

  • Fixed IPv4 route handling for WAN dial-up connections.

New in cFosSpeed 9.05 Build 2076 Beta (Oct 4, 2013)

  • Fixed IPv6 route handling for WAN dial-up connections.
  • Added new state 8 (at least one FIN-ACK) for -tcp-session rule.

New in cFosSpeed 9.05 Build 2075 Beta (Oct 2, 2013)

  • Added -ipv4, -ipv6 rules.
  • Added -icmpv6-type rule that only matches IPv6 packets.
  • Converted all other filter rules to IPv6, where applicable.
  • Fixed faulty lowering of statistical max. rx-speed when port was opened.

New in cFosSpeed 9.05 Build 2074 Beta (Sep 19, 2013)

  • cFosSpeed now also ignores traffic to/from unique local IPv6 addresses, that is, addresses of the form fc00::/7.
  • "spd cons" dialog is now flexibly formatted so it looks good with and without IPv6 addresses :)

New in cFosSpeed 9.05 Build 2073 Beta (Aug 31, 2013)

  • RWIN expansion, RX shaping, ICMPv6/UDP ping latency measurement & packet decoding now support IPv6.
  • Updated NDIS offload options for IPv6
  • Re-introduced avg. segment size display in "spd cons". Use "spd cons -ass" :)
  • The msslimit variable has been removed and replaced by the mtu_limit variable. In IPv4 MTU = MSS+40, so if you had msslimit set to 1400, you want to set mtu_limit now to 1440.
  • The "spd stat_infos" command has been renamed to "spd port_stats".

New in cFosSpeed 9.05 Build 2072 Beta (Aug 16, 2013)

  • IPv6 traffic is now understood by cFosSpeed, but RWIN expansion, RX shaping and some other features are still missing.
  • Improved "spd -tcpview" output.
  • Fixed missing program names in UDP connection overview.

New in cFosSpeed 9.05 Build 2071 Beta (Aug 1, 2013)

  • Fixed colors in settings dialog.
  • Fixed a bug in RWIN expansion that caused TCP streams to stop

New in cFosSpeed 9.05 Build 2070 Beta (Jul 30, 2013)

  • Added IPv6 to spd ports / stat_infos.
  • MPEG Dash is now detected if the content-type is either "text" or "application/...".
  • Fixed IPv6 prefix length for adapter's primary IPv6 address.
  • Fixed half-open session counter after "spd ns".
  • "Open cFosSpeed console" is now available as well in the context menu under Traffic Shaping, since Win8 doesn't offer the start menu any more.

New in cFosSpeed 9.05 Build 2069 Beta (Jul 24, 2013)

  • Added support for Windows 8.1.
  • Fixed version checker that queried for new versions too often.

New in cFosSpeed 9.05 Build 2068 Beta (Jul 12, 2013)

  • Fixed "spd ns" and "spd nsclear".
  • Fixed a potential bluescreen.
  • Fixed load problem on Windows XP.

New in cFosSpeed 9.05 Build 2067 Beta (Jul 9, 2013)

  • cFosSpeed can now evaluate IPv6 routing info. IPv6 traffic is now used by the driver and displayed in the status window and counted in "spd ns". The next step will be to inspect packets and prioritize traffic.
  • Hopefully fixed a rare bluescreen where cFosSpeed ran out of kernel stack space, if RWIN expansion was enabled. Thanks to BenYeeHua for bug report
  • and dump file.

New in cFosSpeed 9.05 Build 2065 Beta (Jun 12, 2013)

  • Improved stream detection for Youtube. They are using MPEG Dash and report the content-type as text. So cFosSpeed now tries to look into the first few bytes of the HTTP body to detect video streamy.

New in cFosSpeed 9.05 Build 2064 Beta (Jun 5, 2013)

  • Hopefully fixed a bug in RWIN expansion that caused downloads to hang.

New in cFosSpeed 9.05 Build 2063 Beta (May 30, 2013)

  • From the data we see in the crash reports you send us, we see a lot of crashes caused by viruses or malfunction of security software. So from now on the crash handler will try to report if the crash was caused by a virus or malfunctioning software (which installs "hooks"). So you can take measures to increase system stability, e.g. clean your system, update your security software, etc.
  • Added more trace output to dump.txt file.
  • Added new "spd gset dump_sessions 5": delete dump file if no RWIN expansion took place.

New in cFosSpeed 9.05 Build 2062 Beta (May 17, 2013)

  • If the number of connections is exhausted, cFosSpeed will no longer fill the trace file with error messages. Thanks to rolfy for inspiration.

New in cFosSpeed 9.05 Build 2061 Beta (May 15, 2013)

  • Fixed a blue screen in cFosSpeed that sometimes occured when cFosSpeed went to sleep.

New in cFosSpeed 9.05 Build 2060 Beta (Apr 24, 2013)

  • Now the completely new russian translation is actually included!

New in cFosSpeed 9.04 Build 2051 (Apr 20, 2013)

  • New skin in Metro style.
  • Tweaked behaviour of auto hide on fullscreen, so it respects manual window closing and auto-open/hide settings better.
  • After the status windows was closed 3 times, cFosSpeed will now ask you if you want to disable auto-open/auto-hide.
  • RWIN expansion now opens the window more eagerly.
  • Completely new russian translation.
  • When TS was switched off, RWIN expansion was still on. Fixed.
  • Fixed a bug in RWIN expansion which caused some downloads to start very slow.
  • Connection startup should be faster now.
  • Total Net talk speed is now always greater or equal local speed. Due to rounding there could have been some inaccuracies. Fixed.
  • Fixed slot configuration button in skins.
  • Fixed a bug in current connections dialog with spaces in filename.
  • Fixed a bug introduced in 9.01 build 2030 that caused too much spd.exe CPU load.
  • Removed some useless checks at Setup start that failed with some users.
  • Fixed console pair priorisation.
  • Fixed errors and improved crash dump handling in installer.

New in cFosSpeed 9.03 Build 2050 Beta (Apr 16, 2013)

  • More fixes in RWIN expansion. Hopefully, all is well now.

New in cFosSpeed 9.03 Build 2049 Beta (Apr 13, 2013)

  • RWIN expansion now opens the window more eagerly.
  • More fixes in RWIN expansion. Connection startup should be faster now.

New in cFosSpeed 9.03 Build 2048 Beta (Apr 12, 2013)

  • When TS was switched off, RWIN expansion was still on. Fixed.
  • Fixed a bug in RWIN expansion which caused some downloads to start very slow.

New in cFosSpeed 9.03 Build 2047 Beta (Apr 9, 2013)

  • Fixed a bug introduced in build 2046 that caused installation to fail.

New in cFosSpeed 9.03 Build 2046 Beta (Apr 7, 2013)

  • Better crash dump handling in installer.
  • Changes in Metro style.

New in cFosSpeed 9.03 Build 2045 Beta (Mar 15, 2013)

  • Better crash dump handling in installer.
  • Changes in Metro style.

New in cFosSpeed 9.03 Build 2044 Beta (Mar 8, 2013)

  • New skin in Metro style.
  • Tweaked behaviour of auto hide on fullscreen, so it respects manual window closing and auto-open/hide settings better.
  • After the status windows was closed 3 times, cFosSpeed will now ask you if you want to disable auto-open/auto-hide.
  • Fixed a bug in current connections dialog with spaces in filename.

New in cFosSpeed 9.03 Build 2043 Beta (Feb 26, 2013)

  • Hopefully fixed a bug introduced in 9.01 build 2030 that caused too much spd.exe CPU load.

New in cFosSpeed 9.03 Build 2042 Beta (Feb 22, 2013)

  • Removed some useless checks at Setup start that failed with some users.
  • Added file trace object to crash dump file.

New in cFosSpeed 9.03 Build 2041 Beta (Feb 21, 2013)

  • Fixed console pair priorisation
  • Fixed error in installer crash dump handling.

New in cFosSpeed 9.02 Build 2032 (Feb 15, 2013)

  • Improved crash handling.
  • Skins can now display a simple bar, instead of a bitmap, for the ANIMATION and SLIDER methods.
  • Tamed querying of TCP/UDP programs names. Thanks to Litfal for bug report.
  • Fixed a bug where some of the preferences settings would not be saved
  • permanently. Thanks to Norbert & Contor.
  • Fixed multiple rare bugs found through crash dumps sent to us by users.
  • Fixed bugs in the budget configuration dialog. Thanks to dj_hetick.
  • Fixed range and mode settings in Budget Graph dialog. Thanks to Vel.
  • Fixed a bug in the full screen detection routine. Thanks to DJ Deipotent
  • persistently reporting it :-)
  • Fixed a hang in installation.
  • Fixed missing images for dialogs.
  • Usage graph is back.
  • After you click on a "new version available" balloon tip only newer
  • versions than the one indicated will show a new balloon tip.
  • Switched slot order so that net talk is now in the last slot.

New in cFosSpeed 9.01 Build 2031 Beta (Feb 6, 2013)

  • Fixed bugs in the budget configuration dialog. Thanks to dj_hetick.
  • Fixed range and mode settings in Budget Graph dialog. Thanks to Vel.
  • Fixed a bug in the full screen detection routine.
  • Fixed a hang in installation.

New in cFosSpeed 9.01 Build 2030 Beta (Feb 2, 2013)

  • Tamed querying of TCP/UDP programs names. Thanks to Litfal for bug report.
  • Fixed missing images for dialogs.
  • Usage graph is back.
  • Switched slot order so that net talk is now in the last slot.

New in cFosSpeed 9.00 Build 2020 (Jan 29, 2013)

  • Re-vamped dialogs. They are now easier to use, faster and in the new Window 8 style.
  • As part of the dialog re-vamp we changed the Traffic Analysis dialogs so it is easier to use and consistent with the prioritization dialogs. Instead of adding protocols/programs to slots, you now assign groups as they appear in the prioritization dialogs. If you like to also add individual programs or protocols, you can do so with spd commands.
  • Added new filters -tx-lite, -rx-lite and -lite. The idea is to detect "lite data streams", i.e. streams of data that are low volume and not bulk data in nature.
  • Added "spd slot X get/set/add categories CAT1:CAT2:..." command. This will set the slot X programs and protocols to all programs/protocols that are in one the listed categories. A category is the text before the frist "," in settings.ini/user.ini. Example: the line "gw2.exe=Games,Guild Wars 2" in section [highprogs] puts the program "gw2.exe" in the category "Games".
  • Added "spd slot show" command to show all settings for all slots.
  • Added nettalk_tx, nettalk_rx and nettalk_max modes for slots.
  • Fixed a bug in the adapter info display.
  • If setup crashes, it can now send us a dump of the crash to help us fix the problem.
  • Made the prioritization buttons in the current connections dialog more responsive.
  • Added support to set priority if program name is "unknown" or "routed".
  • Link to features.htm on desktop is no longer created for prereleases.
  • Added "spd prioritize pair " command to set temporary prios for the program/protocol pair. The new Standard Current Connections dialog now uses this command.
  • cFosSpeed setup will pop up a warning box if programs are running which are known to cause (at least sometimes) problems when installing/deinstalling. We recommend you close these programs before continuing the setup.
  • Added percentage display for resent packets in "spd netstat".
  • New current connections dialog.
  • Sending of usage reports added.
  • Added Unknown_Bulk l7-protocol with default priority.
  • Improved bulk detection; it should be more stable now. Please report if there is unexpected behaviour.
  • Added -bulk, -tx-bulk, -rx-bulk filter expressions. They are true if any direction, resp. direction rx, resp. direction tx is in bulk mode. Only TCP connections can be in bulk mode, not UDP.
  • Improved HTTP Layer 7 detection. Now cFosSpeed also checks re-used HTTP connections for streaming. This way especially Youtube videos should be detected more reliably.
  • Added global variable min_hops. Usually, cFosSpeed will start with TTL 2 or 3 for ping timings and increase the TTL until a decent destination is found. The min_hops setting can be used to force cFosSpeed to use a higher minimum TTL. Thanks to Kullorki for inspiration.
  • Added a messagebox that is opened if cFosSpeed driver was not loaded. This could happen when you upgrade your system from Windows 7 to Windows 8. You need to reinstall cFosSpeed on Windows 8 to fix that.
  • More trace output when the driver would not install.
  • Added prioritization of program/protocol pair to Advanced Current Connections dialog.
  • Temporary prioritizations are now deleted when the Internet connection is terminated or the machine is rebooted.
  • Fixed a locking problem with multiple ports.
  • Changed minimum speeds for bulk data detection to 30 kb/s rx and 6 kb/s tx.
  • Temporary prioritizations will now affect newly created connects as well. They are deleted if you manually override them or when the machine is rebooted.
  • When prioritizing a connection to lowest, it vanished from the list. Fixed.
  • Fixed bug in checking of product news.
  • Fixed a problem with Youtube bulk-sending with BSTREAM protocol (which is set to "default" priority). The connection would be classified as "low". In our protocol and program logic "default" means "fall-through" and then the last -bulk rule changes the class to low. In general, this is intended, but not with BSTREAM, so we excluded it from the -bulk rule.
  • Fixed bad ping values in "spd ts" display.
  • Added a fix to avoid kernel stack exhaustion.
  • Fixes in Setup to improve handling of rare update-installation issue: On update install, Windows might report the need to reboot after removal of the old cFosSpeed devices, before you can install them again. Setup now honors this.
  • Fixed bug where update install requires system reboot between uninstall and install.
  • Fixed printing of who opened our devices.
  • Installer now keeps "Program Files" folder read-only as Microsoft requests.
  • Fixed several crashes. Thanks to Burkhard Menzler and others for dump files.
  • Some fixes to comply with Win8 logo tests.
  • Fixed problems in current connections dialog with filename that contain spaces.
  • Fixed a Windows 8 bluescreen with DPC_WATCHDOG_VIOLATION (0x133).
  • Deinstallation will now work gracefully if driver was not installed, but service was still installed.
  • The Current Connections dialogs (old and new) now have the same application ID as the options dialogs. Only one of them can be used at the same time. This prevents overwriting prioritization settings from one dialog with another when both dialogs would be open simultaneously.
  • Switched to new compiler.
  • Re-arranged context menu a bit. Removed the "Effects" menu. cFosSpeed now always uses fade-in and slide animations. Also moved "Always on Top", "Auto-Open", "Click Through" options to the "Window Settings" menu and made them global for all windows.
  • Unknown, Unknown_Bulk, Teredo and Teredo_Bulk l7-protocols all have default priority. We recommend not to assign a different priority, because with default priority the program prioritization will take care of it. And if there is not entry for the program the final bulk rule will classify bulk data as "low" and non-bulk as "default".
  • Changes in column sorting in console dialog.

New in cFosSpeed 8.03 Build 2018 Beta (Jan 26, 2013)

  • Fixed bug in slot handling: all data was counted to "User" and none to the other categories. Thanks to Lo0olz for bug report.
  • Fixed bugs in new dialogs.

New in cFosSpeed 8.03 Build 2017 Beta (Jan 25, 2013)

  • Re-vamped dialogs. They are now easier to use, faster and in the new
  • Window 8 style.
  • As part of the dialog re-vamp we changed the Traffic Analysis dialogs so it is easier to use and consistent with the prioritization dialogs. Instead of adding protocols/programs to slots, you now assign groups as they appear in the prioritization dialogs. If you like to also add indididual programs or protocols, you can do so with spd commands.

New in cFosSpeed 8.03 Build 2015 Beta (Jan 19, 2013)

  • Added "spd slot X get/set/add categories CAT1:CAT2:..." command. This will
  • set the slot X programs and protocols to all programs/protocols that are in
  • one the listed categories. A category is the text before the frist "," in
  • settings.ini/user.ini. Example: the line "gw2.exe=Games,Guild Wars 2" in
  • section [highprogs] puts the program "gw2.exe" in the category "Games".
  • Added "spd slot show" command to show all settings for all slots.
  • Added nettalk_tx, nettalk_rx and nettalk_max modes for slots.
  • Fixed a bug in installation DLL.

New in cFosSpeed 8.03 Build 2014 Beta (Jan 15, 2013)

  • Better installer crash handling.
  • More trace output when the driver would not install.

New in cFosSpeed 8.03 Build 2013 Beta (Jan 9, 2013)

  • Fixed a bug in the adapter info display.
  • Improved infos sent to us if setup crashes.
  • Fixed a rare bluescreen.

New in cFosSpeed 8.03 Build 2012 Beta (Jan 8, 2013)

  • Made the prioritization buttons in the current connections dialog more responsive.

New in cFosSpeed 8.03 Build 2011 Beta (Jan 3, 2013)

  • Fixed rounding errors in new Standard Current Connections dialog.
  • Added prioritization of program/protocol pair to Advanced Current Connections dialog.

New in cFosSpeed 8.03 Build 2010 Beta (Dec 26, 2012)

  • Fixed broken new Standard Current Connections dialog.

New in cFosSpeed 8.03 Build 2009 Beta (Dec 18, 2012)

  • Temporary prioritisations are now deleted when the Internet connection is terminated or the machine is rebooted.
  • Added support to set priority if program name is "unknown" or "routed".
  • Link to features.htm on desktop is no longer created for prereleases.
  • Added "spd prioritise pair " command to set temporary prios for the program/protocol pair. The new current connections dialog now uses this command.

New in cFosSpeed 8.03 Build 2008 Beta (Dec 14, 2012)

  • Fixed a crash in installation.
  • Fixed a locking problem with multiple ports.

New in cFosSpeed 8.03 Build 2007 Beta (Dec 13, 2012)

  • cFosSpeed setup will pop up a warning box if programs are running which are Known (at least sometimes) to cause problems when installing/deinstalling. We recommend you close these programs before continuing the setup.
  • Fixed percentage display in connection overview.
  • Changed minimum speeds for bulk data detection to 30 kb/s rx and 6 kb/s tx.
  • Temporary prioritisations will now affect newly created connects as well. They are deleted if you manually override them or when the machine is Rebooted.

New in cFosSpeed 8.03 Build 2006 Beta (Nov 28, 2012)

  • Fixed link in new current connections dialog under IE 10.
  • The Current Connections dialogs (old and new) now have the same application ID as the options dialogs. Only one of them can be used at the same time. This prevents overwriting prioritization settings from one dialog with another when both dialogs would be open simultaneously.

New in cFosSpeed 8.03 Build 2005 Beta (Nov 26, 2012)

  • Hopefully the x86 build work again without crashes.
  • More dialog changes.

New in cFosSpeed 8.03 Build 2004 Beta (Nov 22, 2012)

  • When prioritizing a connection to lowest, it vanished from the list. Fixed.
  • Added percentage display for resent packets in "spd netstat".
  • Changed some compiler settings in an attempt to find memory corruption bug introduced in build 2002. Please report if this version still crashes.

New in cFosSpeed 8.03 Build 2003 Beta (Nov 9, 2012)

  • New current connections dialog.
  • Fixed a script error in the program prioritization dialog.

New in cFosSpeed 8.03 Build 2002 Beta (Nov 7, 2012)

  • Fixed bug in checking of product news.
  • Switched to new compiler.

New in cFosSpeed 8.03 Build 2001 Beta (Oct 18, 2012)

  • Added new filters -tx-lite, -rx-lite and -lite. The idea is to detect
  • "lite data streams", i.e. streams of data that are low volume and not bulk
  • data in nature.
  • Fixed a problem with Youtube bulk-sending with BSTREAM protocol (which is
  • set to "default" priority). The connection would be classified as "low".
  • In our protocol and program logic "default" means "fall-through" and then
  • the last -bulk rule changes the class to low. In general, this is intended,
  • but not with BSTREAM, so we excluded it from the -bulk rule.

New in cFosSpeed 8.03 Build 2000 Beta (Oct 11, 2012)

  • x Fixed bad ping values in "spd ts" display.
  • Re-arranged context menu a bit. Removed the "Effects" menu. cFosSpeed now always uses fade-in and slide animations. Also moved "Always on Top",
  • "Auto-Open", "Click Through" options to the "Window Settings" menu and made them global for all windows.

New in cFosSpeed 8.03 Build 1999 Beta (Oct 6, 2012)

  • Tried to avoid bluescreens when kernel stack is exhausted.

New in cFosSpeed 8.03 Build 1998 Beta (Oct 5, 2012)

  • Fixed time_used variable.

New in cFosSpeed 8.03 Build 1997 Beta (Oct 3, 2012)

  • Sending of usage reports finally added.
  • Fixes in Setup to improve handling of rare update-installation issue: On update install, Windows might report the need to reboot after removal of the old cFosSpeed devices, before you can install them again. Setup now honours this.

New in cFosSpeed 8.03 Build 1996 Beta (Sep 26, 2012)

  • Added Unknown_Bulk l7-protocol with default priority.
  • Unknown, Unknown_Bulk, Teredo and Teredo_Bulk l7-protocols all have default priority. We recommend not to assign a different priority, because with default priority the program prioritisation will take care of it. And if there is not entry for the program the final bulk rule will classify bulk data as "low" and non-bulk as "default".

New in cFosSpeed 8.03 Build 1995 Beta (Sep 24, 2012)

  • Improved bulk detection; it should be more stable now.
  • Added -bulk, -tx-bulk, -rx-bulk filter expressions. They are true if any direction, resp. direction rx, resp. direction tx is in bulk mode. Only TCP connections can be in bulk mode, not UDP.

New in cFosSpeed 8.03 Build 1994 Beta (Sep 18, 2012)

  • Fixed bug where update install requires system reboot between uninstall and install.
  • Better error reporting when (un)installing.

New in cFosSpeed 8.03 Build 1993 Beta (Sep 15, 2012)

  • Fixed printing of who opened our devices.
  • Hopefully improved overwrite problems with update install.
  • Improved installation status error reporting.

New in cFosSpeed 8.03 Build 1992 Beta (Sep 7, 2012)

  • Installer now keeps "Program Files" folder read-only as Microsoft requests.
  • Hopefully fixed a crash.

New in cFosSpeed 8.03 Build 1991 Beta (Aug 30, 2012)

  • Some fixes to comply with Win8 logo tests.

New in cFosSpeed 8.03 Build 1990 Beta (Aug 28, 2012)

  • Builds 1988 and 1989 were actually 1987 builds. Fixed.
  • More fixes for filenames that contain spaces in "Prioritize this connection"
  • dialog.
  • Changes in column sorting in console dialog.
  • Improved error reporting in installer.

New in cFosSpeed 8.03 Build 1989 Beta (Aug 24, 2012)

  • Hopefully fixed a problem with the fix for Windows 8 bluescreen with PC_WATCHDOG_VIOLATION from build 1988.
  • Fixed problems in current connections dialog with filename that contain spaces.

New in cFosSpeed 8.03 Build 1988 Beta (Aug 23, 2012)

  • Tried to fix a Windows 8 bluescreen with DPC_WATCHDOG_VIOLATION (0x133).

New in cFosSpeed 8.03 Build 1987 Beta (Aug 20, 2012)

  • Fixed that bluescreen for good that was introduced in beta 1984!

New in cFosSpeed 8.03 Build 1986 Beta (Aug 18, 2012)

  • Fixed a bluescreen that was introduced in beta 1984.

New in cFosSpeed 8.03 Build 1984 Beta (Aug 16, 2012)

  • Improved HTTP Layer 7 detection. Now cFosSpeed also checks re-used HTTP connections for streaming. This way especially Youtube videos should be detected more reliably.
  • Added Guild Wars 2 (gw2.exe) to program prioritization list.

New in cFosSpeed 8.03 Build 1983 Beta (Aug 10, 2012)

  • Deinstallation will now work gracefully, if driver was not installed, but
  • service was still installed.

New in cFosSpeed 8.03 Build 1982 Beta (Jul 11, 2012)

  • Added global variable min_hops. Usually, cFosSpeed will start with TTL 2 or 3 for ping timings and increase the TTL until a decent destination is found. The min_hops setting can be used to force cFosSpeed to use a higher minimum TTL. Thanks to Kullorki for inspiration.
  • Added a messagebox that is opened if cFosSpeed driver was not loaded. This could happen when you upgrade your system from Windows 7 to Windows 8. You need to reinstall cFosSpeed to fix that.

New in cFosSpeed 8.03 Build 1981 Beta (Jul 10, 2012)

  • Fixed a long-standing problem where Setup would not uninstall or update-install without a reboot on certain systems.

New in cFosSpeed 8.02 build 1972 (Jul 2, 2012)

  • Added expand_rwin variables to output of "spd tcb".
  • The WMI provider in cFosSpeed now also supports GetObject/GetObjectAsync,
  • so more flexible WMI scripts are possible.
  • Fixed a bug in RWIN expansion. This bug caused prevented connections to
  • certain servers. This could improve download speed with some servers as well.
  • It could have happened that class delays were still set after rx-shaping was
  • switched off (you could see that with "spd classes"). That would have
  • resulted in unnecessary delays. Fixed.
  • If the un/update-installation fails because the service could not be deinstalled, the installed will now return a proper error message asking you
  • to reboot and try again.
  • Fixed a problem where an update install would sometimes fail, because
  • spd.exe could not be deleted.
  • Improved error handling if cFosSpeed service could not be deleted on update
  • install.
  • Hopefully fixed a crash.
  • Small fix for RWIN expansion and added more debug output.
  • If you had several IPs set for your network card, cFosSpeed would have used
  • them in unspecific order, depending on the ARP requests sent. Now cFosSpeed should always use the primary IP.

New in cFosSpeed 8.01 Build 1971 Beta (Jun 30, 2012)

  • If the un/update-installation fails because the service could not be installed, the installed will now return a proper error message asking you to reboot and try again.

New in cFosSpeed 8.01 Build 1970 Beta (Jun 29, 2012)

  • Fixed a problem where an update install would sometimes fail, because spd.exe could not be deleted.

New in cFosSpeed 8.01 Build 1969 Beta (Jun 28, 2012)

  • Added expand_rwin variables to output of "spd tcb".
  • The WMI provider in cFosSpeed now also supports GetObject/GetObjectAsync,
  • so more flexible WMI scripts are possible.
  • Fixed a bug in RWIN expansion. This bug caused prevented connections to
  • certain servers. Thanks to Marcus Rüppel for his help. This could improve download speed with some servers as well.
  • It could have happened that class delays were still set after rx-shaping was
  • switched off (you could see that with "spd classes"). That would have
  • resulted in unnecessary delays. Fixed.
  • Improved error handling if cFosSpeed service could not be deleted on update install.
  • Hopefully fixed a crash. Thanks to Bartosz Polanski for dump files.
  • Small fix for RWIN expansion. Still looking for the big fish, so more debug
  • output was added. Thanks to Marcus Rüppel.
  • If you had several IPs set for your network card, cFosSpeed would have used
  • them in unspecific order, depending on the ARP requests sent. Now cFosSpeed should always use the primary IP.

New in cFosSpeed 8.01 Build 1968 Beta (Jun 21, 2012)

  • Improved error handling if cFosSpeed service could not be deleted on update install.

New in cFosSpeed 8.01 Build 1967 Beta (Jun 12, 2012)

  • It could have happened that class delays were still set after rx-shaping was switched off (you could see that with "spd classes"). That would have resulted in unnecessary delays. Fixed.

New in cFosSpeed 8.01 Build 1966 Beta (Jun 2, 2012)

  • Hopefully fixed a crash.

New in cFosSpeed 8.01 Build 1965 Beta (Jun 1, 2012)

  • If you had several IPs set for your network card, cFosSpeed would have used them in unspecific order, depending on the ARP requests sent. Now cFosSpeed should always use the primary IP.

New in cFosSpeed 8.01 Build 1964 Beta (May 30, 2012)

  • Hopefully fixed a bug in RWIN expansion with certain servers.

New in cFosSpeed 8.01 Build 1962 Beta (May 30, 2012)

  • Small fix for RWIN expansion. Still looking for the big fish, so more debug output was added.

New in cFosSpeed 8.01 Build 1961 Beta (May 30, 2012)

  • The WMI provider in cFosSpeed now also supports GetObject/GetObjectAsync, so more flexible WMI scripts are possible.

New in cFosSpeed 8.00 Build 1946 (May 30, 2012)

  • cFosSpeed will now automatically expand Windows' TCP RWIN as needed!
  • With our new "Automatic RWIN expansion" cFosSpeed will expand the RWIN (and the matching window scaling) to a value that allows a download with full
  • speed and a delay of 100 msec.
  • This makes system-wide settings of "GlobalMaxTcpWindowSize" or
  • "TcpWindowSize" (under XP) superfluous and will keep your downloads fast even if Windows 7 "auto-tuning" feature doesn't work for you.
  • As an added goodie it will provide fast download even for programs that
  • can not achieve full download speed because they provide too small buffers to the Windows TCP/IP interface, like Cygwin SCP.
  • You can change the maximum delay (i.e. TCP round trip time), but that affects memory consumption: cFosSpeed needs (delay in seconds) * (downloadspeed in bytes/sec) bytes, i.e. for a DSL line with 25 mbits/s (about 3000 kbytes/s) the memory requirement is 0.1 sec * 3000000 bytes/sec = 300 kbytes. To change this time use the "spd gset expand_rwin_dest_time " command.
  • Added WMI support. cFosSpeed creates a WMI class 'cfosspeed_perf_data'
  • in the namespace \root\cfos which has all known skin variables as properties (see www.cfos.de/en/skin/skin-reference.htm for details). This allows WMI utilities to display the same information as in the cFosSpeed status window. There is a little demo of how to access the cFosSpeed WMI data: wmi_demo.hta in the cFosSpeed dialog folder.
  • To help cFosSpeed work with mobile connections it now dynamically tries ping
  • TTL values until someone answers, max with TTL 24. This should help some
  • users, where the first 10 or so hops would not answer.
  • Skin section now have an optional parameter 'print_allowed'. You can set
  • it to 0 to disable this section when not rendered as normal window on
  • screen.
  • Added Slovenian language. That makes a total of 33 languages supported.
  • cFosSpeed now checks every 2 days for program news. If there are any,
  • it displays the mail symbol in the status window and opens a url when
  • clicked. This feature is on by default. If you are not interested in
  • program news, you can turn it off in the context menu under "Options".
  • Fixed a bug with negation of -s-iplist, -d-iplist, -r-iplist, -l-iplist
  • rules.
  • Added work-around for a Windows XP bug which prevented opening of web
  • sites.
  • Fixed a bug in the XL skins, where Mbytes per seconds were not displayed
  • correctly.
  • cFosSpeed now installs on Windows 8 Consumer Preview.
  • Fixed a bug which prevented connections to be displayed by the keyboard
  • LED script.
  • On some machines spd.exe consumed a lot of CPU power and accessed the
  • registry heavily. Fixed.
  • n some machines the status window is not always displayed after sleep. Fixed.
  • The on-the-fly prioritization dialog did not allow you to permanently
  • prioritise programs, which weren't already permanently prioritised. Fixed.
  • Integrated keyboard LED support into cFosSpeed.exe. It no longer uses
  • the scripting host.
  • Program news will not be displayed immediately after first installation.
  • Changed COM initialisation.
  • Improved setupapi log file support.
  • Added memory debugging.
  • OEM versions no longer notify the user about updates.

New in cFosSpeed 7.01 Build 1942 Beta (Apr 26, 2012)

  • To help cFosSpeed work with mobile connections it now dynamically tries ping
  • TTL values until someone answers, max with TTL 24. This should help some
  • users, where the first 10 or so hops would not answer.

New in cFosSpeed 7.01 Build 1941 Beta (Apr 25, 2012)

  • When RWIN Expansion was switched on especially slow connections would become very unresponsive when downloading.

New in cFosSpeed 7.01 Build 1939 Beta (Apr 20, 2012)

  • WMI data is now available even if cfosspeed.exe was started without elevation.

New in cFosSpeed 7.01 Build 1938 Beta (Apr 17, 2012)

  • Skin section now have an optional parameter 'print_allowed'. You can set it to 0 to disable this section when not rendered as normal window on screen

New in cFosSpeed 7.01 Build 1936 Beta (Apr 13, 2012)

  • Added WMI support. cFosSpeed creates a WMI class 'cfosspeed_perf_data'
  • in the namespace \root\cfos which has all known skin variables as properties (see www.cfos.de/en/skin/skin-reference.htm for details). This allows WMI utilities to display the same information as in the cFosSpeed status window. There is a little demo of how to access the cFosSpeed WMI data: wmi_demo.hta in the cFosSpeed dialog folder.

New in cFosSpeed 7.01 Build 1934 Beta (Apr 13, 2012)

  • Fixed a bug with negation of -s-iplist, -d-iplist, -r-iplist, -l-iplist rules. Thanks to Oliver Niebur for the report.
  • Added work-around for a Windows XP bug which prevented opening of web
  • sites.

New in cFosSpeed 7.01 Build 1933 Beta (Mar 30, 2012)

  • Program news will not be displayed immediately after first installation.
  • Fixed a bug in the XL skins, where Mbytes per seconds were not displayed
  • correctly.

New in cFosSpeed 7.01 Build 1931 Beta (Mar 22, 2012)

  • Changed COM initialisation.

New in cFosSpeed 7.01 Build 1928 Beta (Mar 8, 2012)

  • cFosSpeed now installs on Windows 8 Consumer Preview.
  • Improved setupapi log file support.

New in cFosSpeed 7.01 Build 1927 Beta (Mar 2, 2012)

  • Fixed a bug which prevented connections to be displayed by the keyboard
  • LED script.
  • Added memory debugging.
  • Added Slovenian language. That makes a total of 33 languages supported.

New in cFosSpeed 7.01 Build 1926 Beta (Feb 23, 2012)

  • Fixed stupid bug that kept automatic RWIN expansion disabled.

New in cFosSpeed 7.01 Build 1925 Beta (Feb 22, 2012)

  • cFosSpeed will now automatically expand Windows' TCP RWIN as needed!
  • With our new "Automatic RWIN expansion" cFosSpeed will expand the RWIN (and the matching window scaling) to a value that allows a download with full
  • speed and a delay of 100 msec.
  • This makes system-wide settings of "GlobalMaxTcpWindowSize" or
  • "TcpWindowSize" (under XP) superfluous and will keep your downloads fast even if Windows 7 "auto-tuning" feature doesn't work for you.
  • As an added goodie it will provide fast download even for programs that
  • can not achieve full download speed because they provide too small buffers to the Windows TCP/IP interface, like Cygwin SCP.
  • You can change the maximum delay, but that affects memory consumption:
  • cFosSpeed needs (delay in seconds) * (downloadspeed in bytes/sec) bytes,
  • i.e. for a DSL line with 25 mbits/s (about 3000 kbytes/s) the memory requirement is 0.1 sec * 3000000 bytes/sec = 300 kbytes. To change this time use the "spd gset expand_rwin_dest_time " command.

New in cFosSpeed 7.01 Build 1924 Beta (Feb 22, 2012)

  • Fixed a memory leak in cfosspeed.exe.

New in cFosSpeed 7.01 Build 1923 Beta (Feb 22, 2012)

  • OEM versions no longer notify the user about updates.

New in cFosSpeed 7.01 Build 1922 Beta (Jan 12, 2012)

  • On some machines spd.exe consumed a lot of CPU power and accessed the registry heavily. Fixed.
  • On some machines the status window is not alwaysw displayed after sleep. Hopefully fixed.

New in cFosSpeed 7.01 Build 1921 Beta (Dec 8, 2011)

  • cFosSpeed now checks every 2 days for program news. If there are any, it displays the mail symbol in the status window and opens a url if clicked. This feature is on by default. If you are not interested in program news, you can turn it off in the context menu under "Options".
  • Fixed missing ml-string.

New in cFosSpeed 7.01 Build 1920 Beta (Nov 18, 2011)

  • The on-the-fly prioritization dialog did not allow you to permanently prioritize programs, which weren't already permanently prioritized. Fixed

New in cFosSpeed 7.00 Build 1901 (Nov 9, 2011)

  • Added manual priorisation for connections, i.e. you can set connections
  • to a desired class based on their addresses, l7-protocols or programs
  • Use the "spd prio" (or prioritize or prioritise) command to set the prio
  • on the command line
  • Help says
  • prioritise tcp
  • prioritise udp
  • prioritise prot
  • prioritise prog
  • and may contain '?' and '*' wildcards
  • examples
  • prioritise tcp 192.168.8.204:52437 194.95.249.23:80 default
  • prioritise udp 192.168.8.204:* 208.67.222.222:53 high
  • prioritise prot *BULK low
  • prioritise prog utorrent.exe lowest
  • An upcoming version will have a GUI to set priorities
  • cFosSpeed now has class delay management: this regulates the delay of each
  • traffic class (which is user configurable) based on the amount of traffic
  • in the class in comparison to other classes
  • Example: if you have a lot of traffic in your 'low' class and your 'high'
  • class traffic doesn't get enough bandwidth, cFosSpeed will introduce some
  • delay for the 'low' class, so it sends less rapidly and your 'high' class
  • streams get some additional performance
  • This should greatly help heavy downloaders like torrent users
  • cFosSpeed will now actively slow down the rx-speed of download streams if
  • they are prioritised lower than other streams which run at the same time
  • In other words: if you are watching a video stream in your brower (high
  • prio) and downloading at the same time (low prio), cFosSpeed will slow down
  • the downloads to make sure you get enough bandwidth for the the video
  • But if the video is stopped, all bandwidth is again available for the
  • downloads
  • This can be switched off by "spd gset throttle_fast 0". Default is on
  • "spd classes" and "spd cons -wquot" et al. show a column named "wquot"
  • which is a quotient that shows how fast a stream resp. class is in
  • comparision to how fast it should be. E.g. a quotient of 1.00 means
  • perfect, 1.5 means 50% too fast, 0.8 means 20% too slow
  • To comply with the Windows design guides, cFosSpeed now stores all global
  • and Traffic Shaping related data in \ProgramData\cFos\cFosSpeed directory
  • All user specific data, like selected language and skins, are stored in
  • Users\\Appdata\Local\cFos\cFosSpeed
  • The -weight class parameter that is specified in the default settings does
  • now specify the weight of all rx-streams in a class and no longer the weight
  • of a single stream. This helps to keep fast sending streams of low priority
  • like P2P) slower and higher prio streams faster. A exacter regulation is
  • still in development
  • Added On-the-fly prioritization. The "current connections" dialog now
  • has the option to prioritize a connection, protocol or program temporary
  • or easily add it to the prioritization scheme. Just click on a connection
  • to change its priority. In many cases it will be easier to use this dialog
  • than the normal program and protocol prioritization dialogs. So, for example
  • while you work/play on your computer and notice a certain connection uses
  • too much bandwidth, you can click it and reduce its priority without changing
  • the general prioritization system
  • You can now undo the change of priority by using a "spd prio none"
  • command (i.e. by specifying a command with the class name "none"). The class
  • is then reset to the value before the setting
  • Only classes that are no longer 'idle' or 'working' can be changed in their
  • priority. Otherwise, they are not in use anyway, since 'idle' or 'working'
  • are only set on fresh connections were the priority could not yet been
  • determined
  • Added filter expression -manual. It's true for packets on connections that
  • have been manually changed in their priority
  • The "spd perf" setting is now automatically saved
  • Added Indonesian & British English language. That makes a total of 32
  • languages supported. Even more languages are downloadable from our web site
  • here: http://www.cfos.de/speed/documentation/lang.htm
  • The L7 detector now recognizes Bittorrent uTP
  • class rule works now for UDP connections as well
  • "spd classes" command shows stats for all classes in table form
  • Added -delay parameter for classes. With this you can make sure packets in
  • that class are sent only after a minimum delay time in the queue. That is
  • delay cann add some ADDITIONAL delay for packets. By default, all delays
  • are set to 0, i.e. no additional delays are introduced
  • Added -class filter expression. This allows filtering after the class of a
  • TCP stream, i.e. you could use the filter "-tx -higher -class lower -c lower"
  • to filter out all TCP ACKs of streams that are classified as lower
  • The program and protocol prioritization dialogs now have a button
  • to restore the prioritization settings to their default values
  • The program prioritization dialog now allows you to suggest a newly added
  • program to the cFos team, so we can include it in future releases
  • Changed the look of the current connections dialog. It also now has a
  • "Freeze" button to stop periodical update of the current connections
  • Speeded protocol and program prioritization dialogs. This also
  • fixes the bug where IE9 causes page display problems when switching to
  • the games section
  • Skins now support an x- and y- positioning offset. By specifying
  • x_ofs= and y_ofs= in the [all] section of the skin .INI you
  • can move the skin's default position by pixels to the right and
  • pixels to the bottom. This is useful, if the skins have shadows
  • Auto-hide on fullscreen now also works after you opened/closed the
  • window manually. However, if you turn off auto-open/auto-hide
  • Auto-hide on fullscreen is also deactivated
  • Due to popular demand, we added an option to lock the window position to
  • the window settings sub-menu
  • Added Layer-7 stream detection for VLC and Media Player Classic
  • From now on, installation archives contain both x86 and x64 flavours of
  • cFosSpeed ("fat" archives). The right Setup is started automatically
  • Furthermore, the archives are packed with LZX, resulting in a higher
  • compression ratio
  • Status window auto-arrange is now turned off when you manually move the
  • status window
  • Added "spd echo ..." command that just echos the text to the trace file and
  • console
  • Fixed the 2 window problem and disabled line calibration / send test pings in
  • cfosspeed context menu
  • Fixed several bugs in the Online Budget/Counter dialogs
  • Fixed truncated l7-protocol names in connection overview
  • Fixed a crash. Thanks to Norbert Paradowski for dump file
  • When you press the freeze button in the current connections dialog and
  • then click on one of the sorter tabs, the current connections are still
  • refreshed and sorted
  • Fixed a bug where net_talk_bcast would not be saved properly and was lost
  • after the next restart. Thanks to ?????? ??????? for his bug report
  • Fixed bugs in rx-shaping code
  • Fixed a long-standing bug, where the status window would disappear
  • after stand-by/wake up
  • Fixed a bug where newer dialog html files would not overwrite the old
  • ones during an update installation
  • Fixed a bug that caused the driver not to load sometimes after booting
  • If a ping_dest has been set by the user we accept ping replies ("pongs")
  • to any TTL. Otherwise, only ping replies to TTLs 2-4 are accepted. Thanks
  • to tomtores for inspiration
  • Fixed a rare bluscreen
  • Added check against NULL pointer in Windows 7 mobile broadband driver status
  • messages. Thanks to marmal for bug report and dump file

New in cFosSpeed 6.61 Build 1899 Beta (Nov 4, 2011)

  • Sometimes there could be two status windows displayed. This should be fixed now.

New in cFosSpeed 6.61 Build 1898 Beta (Nov 4, 2011)

  • Found and fixed the 100% CPU load problem.

New in cFosSpeed 6.61 Build 1897 Beta (Nov 2, 2011)

  • Still searching for the 100% CPU load problem. Added new debug output to cfosspeed.exe.

New in cFosSpeed 6.61 Build 1896 Beta (Nov 2, 2011)

  • Tried to fix 100% CPU load problem in cfosspeed.exe. If it still takes 100% load, please send again a dump from "procdump -ma cfosspeed".

New in cFosSpeed 6.61 Build 1895 Beta (Oct 29, 2011)

  • More debugging support for 100% CPU load problem in cfosspeed.exe.

New in cFosSpeed 6.61 Build 1894 Beta (Oct 25, 2011)

  • Status window auto-arrange is now turned off when you manually move
  • the status window.
  • Added debugging support for 100% CPU load problem in cfosspeed.exe.

New in cFosSpeed 6.61 Build 1893 Beta (Oct 21, 2011)

  • Fixed truncated l7-protocol names in connection overview.

New in cFosSpeed 6.61 Build 1892 Beta (Oct 20, 2011)

  • Fixed a crash.

New in cFosSpeed 6.61 Build 1891 Beta (Oct 19, 2011)

  • Added On-the-fly prioritization. The "current connections" dialog now has the option to prioritize a connection, protocol or program temporary or easily add it to the prioritization scheme. Just click on a connection to change its priority. In many cases it will be easier to use this dialog than the normal program and protocol prioritization dialogs. So, for example, while you work/play on your computer and notice a certain connection uses too much bandwidth, you can click it and reduce its priority without changing the general prioritization system.
  • Fixed a memory leak.

New in cFosSpeed 6.61 Build 1890 Beta (Oct 18, 2011)

  • You can now undo the change of priority by using a "spd prio none" command (i.e. by specifying a command with the class name "none"). The class is then reset to the value before the setting
  • Only classes that are no longer 'idle' or 'working' can be changed in their
  • priority. Otherwise, they are not in use anyway, since 'idle' or 'working'
  • are only set on fresh connections were the priority could not yet been
  • determined
  • Added filter expression -manual. It's true for packets on connections that
  • have been manually changed in their priority.
  • Fixed bug from last beta: connections were all classified as 'idle' or waiting'.

New in cFosSpeed 6.61 Build 1889 Beta (Oct 17, 2011)

  • Added manual priorisation for connections, i.e. you can set connections to a desired class based on their addresses, l7-protocols or programs. Use the "spd prio" (or prioritize or prioritise) command to set the prio on the command line

New in cFosSpeed 6.61 Build 1887 Beta (Oct 13, 2011)

  • cFosSpeed now has class delay management: this regulates the delay of each traffic class (which is user configurable) based on the amount of traffic in the class in comparison to other classes. Example: if you have a lot of traffic in your 'low' class and your 'high' class traffic doesn't get enough bandwidth, cFosSpeed will introduce some delay for the 'low' class, so it sends less rapidly and your 'high' class streams get some additional performance.
  • The "spd perf" setting is now automatically saved.
  • Added Indonesian & British English language. That makes a total of 32 languages supported.

New in cFosSpeed 6.61 Build 1886 Beta (Oct 6, 2011)

  • The L7 detector now recognizes Bittorrent uTP.
  • class rule works now for UDP connections as well.
  • When you press the freeze button in the current connections dialog and
  • then click on one of the sorter tabs, the current connections are still
  • refreshed and sorted.
  • Fixed a bug where net_talk_bcast would not be saved properly and was lost
  • after the next restart.
  • Fixed a BSOD.

New in cFosSpeed 6.61 Build 1885 Beta (Sep 28, 2011)

  • cFosSpeed will now actively slow down the rx-speed of download streams if
  • they are prioritised lower than other streams which run at the same time.
  • In other words: if you are watching a video stream in your brower (high
  • prio) and downloading at the same time (low prio), cFosSpeed will slow down
  • the downloads to make sure you get enough bandwidth for the the video.
  • But if the video is stopped, all bandwidth is again available for the
  • downloads. This can be switched off by "spd gset throttle_fast 0". Default is on.
  • "spd classes" and "spd cons -wquot" et al. show a column named "wquot",
  • which is a quotient that shows how fast a stream resp. class is in
  • comparision to how fast it should be. E.g. a quotient of 1.00 means
  • perfect, 1.5 means 50% too fast, 0.8 means 20% too slow.
  • "spd classes" command shows stats for all classes in table form.
  • Fixed bugs in rx-shaping code.

New in cFosSpeed 6.61 Build 1884 Beta (Sep 22, 2011)

  • The -weight class parameter that is specified in the default settings does
  • now specify the weight of all rx-streams in a class and no longer the weight
  • of a single stream. This helps to keep fast sending streams of low priority
  • like P2P) slower and higher prio streams faster. A exacter regulation is
  • still in development.
  • Added -delay parameter for classes. With this you can make sure packets in
  • that class are sent only after a minimum delay time in the queue. That is,
  • delay cann add some ADDITIONAL delay for packets. By default, all delays
  • are set to 0, i.e. no additional delays are introduced.
  • Added -class filter expression. This allows filtering after the class of a
  • TCP stream, i.e. you could use the filter "-tx -higher -class lower -c lower"
  • to filter out all TCP ACKs of streams that are classified as lower.

New in cFosSpeed 6.61 Build 1883 Beta (Sep 21, 2011)

  • Fixed a long-standing bug, where the status window would disappear after stand-by/wake up.
  • The program and protocol prioritization dialogs now have a button to restore the prioritization settings to their default values.
  • The program prioritization dialog now allows you to suggest a newly added program to the cFos team, so we can include it in future releases.

New in cFosSpeed 6.61 Build 1882 Beta (Sep 2, 2011)

  • Changed the look of the current connections dialog. It also now has a
  • "Freeze" button to stop periodical update of the current connections.
  • Fixed broken context menu entries introduced in build 1881.
  • Column sorting in console dialog works again.
  • Fixed a bug where newer dialog html files would not overwrite the old ones during an update installation.

New in cFosSpeed 6.61 Build 1881 Beta (Aug 27, 2011)

  • Due to work on the console dialog, column sorting currently doesn't work.
  • We will fix this in the next beta.
  • Speeded protocol and program prioritization dialogs. This also fixes the bug where IE9 causes page display problems when switching to the games section.
  • Skin now support an x- and y- positioning offset. By specifying x_ofs= and y_ofs= in the [all] section of the skin .INI you can move the skin's default position by pixels to the right and pixels to the bottom. This is useful, if the skins have shadows.
  • Auto-hide on fullscreen now also works after you opened/closed the window manually. However, if you turn off auto-open/auto-hide
  • Auto-hide on fullscreen is also deactivated.
  • Due to popular demand, we added an option to lock the window position to
  • the window settings sub-menu.

New in cFosSpeed 6.61 Build 1879 Beta (Aug 27, 2011)

  • Added Layer-7 stream detection for VLC and Media Player Classic.
  • Added "spd echo ..." command that just echos the text to the trace file and
  • console.

New in cFosSpeed 6.61 Build 1877 Beta (Aug 27, 2011)

  • Fixed a bug that caused the driver not to load sometimes after booting.

New in cFosSpeed 6.61 Build 1875 Beta (Jun 15, 2011)

  • If a ping_dest has been set by the user we accept ping replies ("pongs")
  • to any TTL. Otherwise, only ping replies to TTLs 2-4 are accepted. Thanks
  • to tomtores for inspiration.
  • Fixed a rare bluscreen.

New in cFosSpeed 6.61 Build 1871 Beta (May 27, 2011)

  • Added check against NULL pointer in Windows 7 mobile broadband driver status messages. Thanks to marmal for bug report and dump file.

New in cFosSpeed 6.61 Build 1870 Beta (May 14, 2011)

  • From now on, installation archives contain both x86 and x64 flavours of cFosSpeed. The right Setup is started automatically. Furthermore, the archives are packed with LZX, resulting in a higher compression.

New in cFosSpeed 6.60 Build 1852 (May 12, 2011)

  • Added support for Logitech G15 and G19 Gamer keyboards. When cFosSpeed detects such a keyboard, it offers a the option to display the status window on the display of the G15 or G19 display. If you enable it, the skin windows will then be displayed on the keyboards display, thereby offering all cFosSpeed Traffic Shaping information during fullscreen mode apps / games. In addition, you can switch between low latency / favour bandwidth wit the Button 1 on the G15 and the UP Button on the G19.
  • Skins for Logitech G15 & G19 were donated by Ingo Günther.
  • Added keyboard LED indicators. cFosSpeed can indicate certain traffic shaping values by blinking the Num Lock and Scroll Lock LEDs.
  • When the traffic class is still not set (at the beginning of a connection) the class column will display "working" or nothing. If more traffic is coming, the class name will be shown or when no rule matches and no class has yet been set for a connection the class is set to default.
  • If traffic shaping is (partly) inactive, this is now shown in "spd speed" command.
  • Added -udp-vol rule: it counts the volume of an UDP pseudo-connection. Volume in this sense are all bytes including the IP and UDP header. Added -udp-cnt rule: it counts the number of UDP packets in an UDP pseudo-connection.
  • Extended arguments for -tcp-seq and -tcp-cnt rules to 64 bit.
  • Added gset variable tx_shape, default 1, to en/disable tx-shaping globally.
  • TCP SYNs were not properly prioritized. Fixed.
  • Uploads do now slow down downloads less than before.
  • Fixed behaviour of overlapping active areas in skins. Now the topmost one catches the mouse click.
  • For troubleshooting, you can now specify the Net Talk broadcast address. Use "spd set net_talk_bcast x.x.x.x" to do that, address 0.0.0.0 means use default, which is 255.255.255.255 or the subnet broadcast address like 192.168.0.255. Thanks to Drool for inspiration.
  • Fixed serious bug in -l7-prot, -udp-prog, -tcp-prog and -prog filter rules when they were used with negation (like -l7-prot [email protected]/normalprots). This caused program and protocol settings to malfunction if you had made changes to them (changes are recorded in user.ini and filter rules contain negations to read them properly). This bug was introduced in since v5.13.1694. Thanks to km for his bug reports.
  • The installer started the status window with elevation. Fixed.
  • Fixed installation problems where cfosspeed.exe could not be overwritten.
  • Fixed a potential problem when stopping a system service.
  • Skins would not display more than 21Mb/s speed. Fixed.
  • Fixed a long-standing problem where cFosSpeed might perform poorly after a wakeup from standby. Notably, UDP connections would not time-out and ever increase in numbers.
  • Fixed a error where certain skins would be incorrectly loaded and thus not displayed at all.
  • Fixed a bug in -prog and -l7-prot filters: they did not properly accept multiple arguments separated by commas. Thanks to Thomas Quella for his bug report.
  • Large ping values were always displayed as 999ms. Fixed.
  • On some machines the status window was always topmost. Fixed.
  • Fixed a spurious freeze. Thanks to Andrey Chernov for dump file.
  • For Windows 7 the main icon is not hidden as long as at least one icon skin is displayed. Otherwise Windows cannot remember the icon settings. If you don't want to see the main icon, you can disable it in the context menu. For older OSes the main icon is hidden as long as at least one icon skin is displayed.
  • Variance accommodation now works for satellite connections with their very long ping times as well.
  • No pinger boot will be done if both rx_shape and tx_shape are 0.
  • Better tracking if test-pings reached the destination. If so, pinger will not be used for burst and pingstat line starts with a '+'.
  • Tested cFosSpeed with "teaming". We used an Intel Gigabit ET Dual Port Server Adapter and their most recent teaming software v16.2. Please note: The route to the Internet must go through the virtual teaming adapter, not through one of the individual teamed adapters.
  • Important notifications, e.g. the calibration notification and the trial period expiration messages are now indicated by a symbol in the status window if the skin supports it. Otherwise, the usual browser popup is used. If you click on the symbol the corresponding website is displayed.
  • The options menu is now also available for non-admins.
  • More trace output for an installation problem where the service can not be deleted.
  • By default max_trace_size is now 10 mbytes.
  • Switched to new compiler.
  • If for some reason test-pings reach their destination (i.e. they are not returned with "TTL exceeded"), we inhibit further test-pings with that TTL.

New in cFosSpeed 6.51 Build 1850 Beta (May 5, 2011)

  • TCP SYNs were not properly prioritized. Fixed.
  • Uploads do now slow down downloads less than before.

New in cFosSpeed 6.51 Build 1849 Beta (May 5, 2011)

  • Added skin for Logitech G15.
  • Fixed link errors in cFosSpeed due to the renaming of most HTML documents at www.cfos.de.
  • Fixed behaviour of overlapping active areas in skins. Now the topmost one
  • catches the mouse click.
  • Important notifications, e.g. the calibration notification and the trial period expiration messages are now indicated by a symbol in the status window if the skin supports it. Otherwise, the usual browser popup is used. If you click on the symbol the corresponding website is displayed.

New in cFosSpeed 6.51 Build 1848 Beta (May 4, 2011)

  • Installer fix.

New in cFosSpeed 6.51 Build 1847 Beta (May 3, 2011)

  • Internal skin method fix

New in cFosSpeed 6.51 Build 1846 Beta (May 2, 2011)

  • The options menu is now also available for non-admins.

New in cFosSpeed 6.51 Build 1845 Beta (Apr 29, 2011)

  • Added skin for display in Logitech G19 gamer keyboard.

New in cFosSpeed 6.51 Build 1844 Beta (Apr 29, 2011)

  • When no rule matches and no class has yet been set for a connection the class is set to default. This partially reverts the change from build 1839.
  • For troubleshooting, you can now specify the Net Talk broadcast address. Use "spd set net_talk_bcast x.x.x.x" to do that, address 0.0.0.0 means use default, which is 255.255.255.255 or the subnet broadcast address like 192.168.0.255. Thanks to Drool for inspiration.

New in cFosSpeed 6.51 Build 1843 Beta (Apr 19, 2011)

  • Fixed serious bug in -l7-prot, -udp-prog, -tcp-prog and -prog filter rules
  • when they were used with negation (like -l7-prot [email protected]/normalprots).
  • This caused program and protocol settings to misfunction if you had made
  • changes to them (changes are recorded in user.ini and filter rules contain
  • negations to read them properly). This bug was introduced in since
  • v5.13.1694.
  • The installer started the status window with elevation. Fixed.

New in cFosSpeed 6.51 Build 1842 Beta (Apr 16, 2011)

  • Fixed problem with monochrome images on the Logitech G15 keyboard.
  • Reverted the behaviour to that of before build 1834 for win 7: the main icon
  • is again not hidden as long as at least one icon skin is displayed. Otherwise Windows cannot remember the icon settings. If you don't want to see the main icon, you can disable it in the context menu.
  • Fixed installation problems where cfosspeed.exe could not be overwritten.

New in cFosSpeed 6.51 Build 1841 Beta (Apr 13, 2011)

  • Fixed a potential problem when stopping a system service

New in cFosSpeed 6.51 Build 1840 Beta (Apr 12, 2011)

  • More trace output for an installation problem where the service can not be deleted

New in cFosSpeed 6.51 Build 1839 Beta (Apr 8, 2011)

  • When the traffic class is still not set (at the beginning of a connection) the column will display "working" or nothing. If more traffic is coming, the class name will be shown.
  • Fixed a bug which caused connection classes to be wrongly set to default.
  • Skins would not display more than 21Mb/s speed. Fixed.
  • Fixed a problem where the service would not be properly stopped, updated and started when update-installing.

New in cFosSpeed 6.51 Build 1838 Beta (Apr 8, 2011)

  • Fixed a long-standing problem where cFosSpeed might perform poorly after a wakeup from standby. Notably, UDP connections would not time-out and ever increase in numbers.

New in cFosSpeed 6.51 Build 1837 Beta (Apr 8, 2011)

  • If traffic shaping is (partly) inactive, this is now shown in "spd speed" command.
  • Fixed a error where certain skins would be incorrectly loaded and thus not displayed at all.

New in cFosSpeed 6.51 Build 1836 Beta (Apr 8, 2011)

  • Fixed a bug in -prog and -l7-prot filters: they did not properly accept multiple arguments separated by commas.

New in cFosSpeed 6.51 Build 1835 Beta (Apr 8, 2011)

  • Added -udp-vol rule: it counts the volume of an UDP pseudo-connection. Volume in this sense are all bytes including the IP and UDP header. Added -udp-cnt rule: it counts the number of UDP packets in an UDP pseudo-connection.
  • Extended arguments for -tcp-seq and -tcp-cnt rules to 64 bit.
  • Large ping values were always displayed as 999ms. Fixed.
  • On some machines, the status window was always topmost. Fixed.
  • Hopefully fixed a spurious freeze. Thanks to Andrey Chernov for dump file.
  • By default max_trace_size is now 10 mbytes.

New in cFosSpeed 6.51 Build 1834 Beta (Apr 8, 2011)

  • The main icon is now hidden as long as at least one icon skin is displayed.
  • Added keyboard LED indicators. cFosSpeed can indicate certain traffic shaping values by blinking the Num Lock and Scroll Lock LEDs.

New in cFosSpeed 6.51 Build 1833 Beta (Apr 8, 2011)

  • Added support for Logitech G15 and G19 Gamer keyboards. When cFosSpeed detects such a keyboard, it offers a the option to display the status window on the display of the G15 or G19 display. If you enable it, the skin windows will then be displayed on the keyboards display, thereby offering all cFosSpeed Traffic Shaping information during fullscreen mode apps / games. In addition you can switch between low latency / favour bandwidth wit the Button 1 on the G15 and the UP Button on the G19.
  • Variance accomodation now works for satellite connections with their very long ping times as well. Thanks to ipcopter.de for help and support.
  • No pinger boot will be done if both rx_shape and tx_shape are 0.
  • Switched to new compiler.

New in cFosSpeed 6.51 Build 1832 Beta (Mar 16, 2011)

  • Better tracking if test-pings reached the destination. If so, pinger will not be used for burst and pingstat line starts with a '+'.
  • If for some reason test-pings reach their destination (i.e. they are not returned with "TTL exceeded"), we inhibit further test-pings with that TTL.

New in cFosSpeed 6.51 Build 1831 Beta (Mar 16, 2011)

  • Added gset variable tx_shape, default 1, to en/disable tx-shaping globally

New in cFosSpeed 6.50 Build 1810 (Feb 9, 2011)

  • cFosSpeed now features packet loss avoidance. Some Internet connections
  • have a very small packet buffer for incoming data. This buffer is quickly
  • overrun when too much data is received, leading to packet loss. The packet
  • loss is then detected by the sending TCP and the rate of transmission is lowered. Nevertheless, this leads to higher ping times and packet loss for all data received, even UDP data used for Gaming or VoIP. Tests show that the packet loss rate can be as high as 5%.
  • Now cFosSpeed detects this packet loss in TCP streams and keeps the streams from sending too much data. This avoids packet loss, leading to much lower loss rates, fewer SACKs and sometimes much better throughput. The feature is on by default, but can be switched off by setting "spd gset avoid_loss 0 -save" or switching off "Packet loss avoidance" under Options, Settings, Preferences.
  • New parameters to set the desired ping delays in both directions: tx_delay, tx_width, rx_delay and rx_width. cFosSpeed tries to keep the ping between tx_delay and tx_delay + tx_width when sending and between rx_delay and rx_delay + rx_width when receiving. The values are in usec. Removed
  • variable dest_width.
  • Added delay_auto setting, true by default. If set, it will automatically set rx_delay and rx_width to sensible values. If you want your own values in rx_delay and rx_width, you just assign some value to them or switch off delay_auto.
  • Rx-shaping is now more precise. It limits sending streams quicker to a proper speed.
  • Tx-shaping has now a better average ping time, since cFosSpeed doesn't try to increase the send speed so often, much less so in low latency mode. This lowers average ping time by about 8 msec in pure upload tests here. Added Bulgarian language. That makes a total of 29 languages supported.
  • Increased installation speed.
  • Even if "Automatic MSS (MTU) optimization" is off (default), a set mss_limit and the intrinsic limit of the medium (like 1492 for PPPoE) will be used to change the MSS. Therefore, it's good to set the medium properly. Plus, it helps rx-shaping.
  • Classes can now have -tos switch set to set TOS byte on all outgoing packets. Since TOS and DSCP both are stored in the same byte, they are incompatible to one another: you can not use both at the same time.
  • Added dumping of TOS values for "spd dump ...".
  • Added "spd vari" command to show variance sample data. It accepts parameters clean to force cleaning of old values, -clear to clear all values and -set to force use of the calculated variance.
  • Added SACK statistics in "spd netstat" and "spd perf on" output.
  • Added "nsclear" command to clear the "netstat" counters.
  • Added filter expressions -l, -r, -l-mynet, -r-mynet, -l-bcast, -r-bcast, l-iplist and -r-iplist. They work like the -s and -d, etc. pendants, just for local and remote addresses, i.e. invariant of the direction of traffic.
  • Added gset variable "max_hops" (default 8) to allow cFosSpeed to ping with
  • higher TTLs. Allowed TTL values are 8 - 16. If you change it, you should use "spd pingboot" afterwards.
  • Added global variable "vari_trace". When switched off new variance data is no longer dumped to trace.txt; that is the default now.
  • Added information about cFosSpeed ports to "Options", "Settings",
  • "Adapter Info" dialog.
  • Fixed a bug in RWIN calculation of rx-shaping.
  • Fixed another bug in rx_limit
  • code and other fixes in rx-shaping.
  • Fixed a serious bug that affected TCP volume counting of sent traffic.
  • Setting a new iplist name under preferences didn't read the IPlist into
  • memory right away, but only on the next start. Fixed. Thanks to Laurentius
  • Weckowski for bug report. You can list all loaded IPlists with the command "spd showiplists".
  • Fixed a problem where variance would not be properly calculated after pinger was changed.
  • Fixed another bug that affected volume counting when net_talk was enabled, but no other user was using cFosSpeed.
  • Fixed bug in medium settings for media cable, frame_count, cable_mixed, 3g.
  • Fixed a problem where cFosSpeed could cause too much delay in tx direction.
  • "spd set ..." settings made on the command line would be lost if changes were made in the HTA applets afterwards. Fixed.
  • Fixed a problem where maxtxraw might become too large. Thanks to
  • Toxic for the trace.
  • Setting msslimit to 536 with medium PPPoE had no effect. Fixed.
  • Removed the additional up to 4 pings per second; it's again sending only 2
  • pings per second.
  • Fixed a freeze with WLAN cards.
  • Switching an adapter On/Off didn't bind/unbind it immediately. Fixed.
  • The TCP MSS will no longer be lowered if the medium "adaptive" is set. If
  • you know the type of your connection, set it properly under Options,
  • Settings, Traffic Shaping, , Options. If you have some DSL variant
  • cFosSpeed might reduce the TCP MSS on your connections to gain up to 3%
  • speed if "Automatic MSS (MTU) optimization" is switched on.
  • Fixed some erroneous UTF-8 BOMs in settings.ini.
  • Fixed a problem where data would sometimes not be written properly to
  • data.ini.

New in cFosSpeed 6.11 Build 1805 Beta (Feb 5, 2011)

  • Increased installation speed.

New in cFosSpeed 6.11 Build 1804 Beta (Feb 3, 2011)

  • Added dumping of TOS values for "spd dump ...".
  • Fixed setting of TOS value for outgoing packets.

New in cFosSpeed 6.10.1774 (Dec 2, 2010)

  • If your line is fast cFosSpeed will send up to 4 pings per second to probe for congestion. This will provide more accurate results.
  • Added "calibrated" value to "spd speed" output to show how well calibrated cFosSpeed already is; a value of 0 means "not at all", 100 means "fully".
  • cFosSpeed is now trying harder to keep starting TCP streams from congesting the downstream path.
  • Improvements for key registration when user has IPv6, but connectivity fails somehow.
  • Added gset variable "max_hops" (default 8) to allow cFosSpeed to ping with higher TTLs. Allowed TTL values are 8 - 16. If you change it, you should use "spd pingboot" afterwards. Thanks to gj090879 for inspiration.
  • Tamed Kaspersky hint. It is now displayed only 3 times.
  • Fixed a bug with key registration behind a proxy server.
  • TTL 1, broadcast and multicast were erroneously considered Internet traffic. Fixed.
  • Increased value for avg_time to improve accuracy of maximum speed measurements.
  • Removed TCP pinger.
  • Added more trace output when key activation fails.

New in cFosSpeed 6.05.1771 Beta (Nov 26, 2010)

  • Tamed Kaspersky hint. It is now displayed only 3 times.
  • Added more trace output when key activation fails.

New in cFosSpeed 6.04 Build 1753 (Nov 25, 2010)

  • Removed cfosspeed.dll which was needed for installation under Windows 2000.
  • Added automatic check for new versions. cFosSpeed checks every 7 days for a new release. You can also set it to check for new beta versions, which are checks for every 2 days. If you don't like to update, you can choose to skip the new version. Then there will be displayed no balloon tips for thisversion any more. Otherwise, a click on the balloon brings you to the download page.
  • Net_talk packets are tamed and sent out only every 15 seconds if there is no other cFosSpeed found.
  • Speeded ICMP packet handling. Thanks to Archer for report.
  • Added option to context menu to send test pings for 60 seconds. This works even if traffic shaping is disabled.
  • Improved pinger selection when ping reliability is low.
  • No pings are sent when there was no traffic for some time. This is to help disconnect-on-idle functionality.
  • Added "Unknown" protocol to priority dialogs as well.
  • Fixed bug in service startup code.
  • Fixed a bug where the installer would ask for your email address even if he already did so in some earlier installation after you changed the installer language.
  • Fixed bug in Adapter Info dialog.
  • License keys that included a limited 1-year update right and were sold until July 2008 for a special price no longer work now. If you want to continue to use cFosSpeed, please purchase an update.
  • Added hint to upgrade to Kaspersky Internet Security 2011 if a 2010 version is found under Vista or higher.
  • Reorganized context menu. Moved the Traffic Shaping menu options into a new Traffic Shaping menu.

New in cFosSpeed 6.03.1752 Beta (Nov 19, 2010)

  • Net_talk packets are tamed and sent out only every 15 seconds, if there is no other cFosSpeed found.
  • If net_talk was switched off, received net_talk packets were ignored as well. Now even then, received packets are used, although no packets are sent out. If you want to disable listening to net_talk packets as well, switch off net_talk_default.
  • Fixed some program priorities and bugs in dialog.

New in cFosSpeed 6.03.1751 Beta (Nov 19, 2010)

  • Speeded ICMP packet handling. Thanks to Archer for report.
  • Fixed bug in service startup code.
  • Fixed some default program priorities.

New in cFosSpeed 6.03.1749 Beta (Nov 19, 2010)

  • Fixed display bug in updater

New in cFosSpeed 6.03.1748 Beta (Nov 12, 2010)

  • Removed cfosspeed.dll which was needed for installation under Windows 2000. Hopefully that will not break any installation under XP; if so, please report back to us.
  • Added automatic check for new versions. cFosSpeed checks every 7 days for a new release. You can also set it to check for new beta versions, which are checks for every 2 days. If you don't like to update, you can choose to skip the new version. Then there will be displayed no balloon tips for this version any more. Otherwise, a click on the balloon brings you to our download page.
  • Fixed a bug where the installer would ask for your email address even if he already did so in some earlier installation after you changed the installer language.
  • Reorganized context menu. Moved the Traffic Shaping menu options into a new Traffic Shaping menu.

New in cFosSpeed 6.03.1746 Beta (Nov 5, 2010)

  • Added option to context menu to send test pings for 60 seconds. This works even if traffic shaping is disabled.

New in cFosSpeed 6.03.1745 Beta (Nov 5, 2010)

  • License keys that included a limited 1-year update right and were sold until July 2008 for a special price no longer work now. If you want to continue to use cFosSpeed, please purchase an update.

New in cFosSpeed 6.03.1744 Beta (Oct 26, 2010)

  • Improved pinger selection when ping reliability is low
  • No pings are sent when there was no traffic for some time. This is to help disconnect on idle functionality
  • Added "Unknown" protocol to priority dialogs as well
  • x cfosspeed.dll is now flagged to support Data Execution Prevention (DEP) and Address space layout randomization (ASLR) as well
  • Added hint to upgrade to Kaspersky Internet Security 2011, if a 2010 version is found under Vista or higher

New in cFosSpeed 6.03.1740 Beta (Sep 24, 2010)

  • Fixed bug in Adapter Info dialog.

New in cFosSpeed 6.02.1722 (Sep 23, 2010)

  • Changed the routing detection. This should make the "redetect routes" option obsolete and help automatically find the Traffic Shaping route, even if other programs don't report their route changes correctly.
  • Fixes for IE 9 beta in the dialog scripts.
  • Some improvements for skins.

New in cFosSpeed 6.00.1700 (Sep 22, 2010)

  • cFosSpeed can now communicate with other cFosSpeed drivers on your LAN to share statistical data of how much each of them sent. This increases the accurary of traffic shaping with more than one machine. We call this feature "net_talk". Statistics are sent out as UDP packets (by default on port 889) five times a second with TTL 1 to your local subnet broadcast address, so they will never leave your LAN.
  • cFosSpeed will show other party's traffic in the Liquid Crystal skins together with your own traffic, just less intensely coloured. The Traffic Analysis skins show the total traffic as small bars under the numerical speed display.
  • There is the new command "ts" or "talkstat" to see which other machines on your LAN use cFosSpeed. The variable "net_talk" can be set to 0 to disable this feature. You can change the UDP port number with the global variable "net_talk_port"; it must be the same on all machines in the LAN.
  • cFosSpeed now measures the variance of ping packets and uses this value when shaping. Usually the variance is quite small (e.g. with DSL 16 mbit/s it's about 4ms), but with wireless networks it can be substantially higher.
  • This value can be accessed via variable "variance" (spd set variance). If you don't want this value to be automatically changed by cFosSpeed, set the global variable "vari_fixed" to 1 (spd gset vari_fixed 1 -save).
  • The "variance" variable will not be automatically changed if you have selected the variable non-cooperative algorithm, since cFosSpeed will not know if changes in ping time are due to variance or traffic from other LAN users. If you use more than one machine on the LAN, be sure to use cFosSpeed on all of them with variable cooperative algorithm.
  • The statistical data on which the variance calculation is based will decay after 15 minutes, so values that are too old will not be used.
  • New skins added: "TA Insight Skin", with Windows 7 look and real-time analysis. Both traffic analysis skins now have a ping variance display and a traffic shaping indicator. The ping variance display shows the variance and statistical certainty of the ping times of your connection. The traffic shaping indicator flashes whenever a packet is prioritized, i.e. when it is sent faster than it would without traffic shaping.
  • Technology update: cFosSpeed is now an NDIS 6 driver for Vista and Windows 7.
  • Thereby cFosSpeed supports the improved performance of the new network architecture.
  • Mobile Broadband Plattform of Windows 7 is now supported. So users of UMTS, WCDMA, CDMA2000, etc. equipment with native mobile broadband drivers can now enjoy the benefits of cFosSpeed Traffic Shaping.
  • The "Programs" and "Protocols" dialogs under "Settings" now allow setting tx-limits per program resp. per protocol, i.e. maximum send speeds.
  • New adapter info dialog to display info about the network cards in your system. There is detailed info for WLAN and WWAN. For WLAN you can try to use the channel recommendation for best throughput in "crowded" areas. But remember the frequency usage may change from minute to minute.
  • For WWAN (Win 7 mobile broadband adapters) you get detailed information about the state of your UMTS/WCDMA/Wi-Max/etc. device.
  • Ingo Günther (our graphics artist) donated again a new icon skin which nicely displays LAN traffic with the Net Talk feature.
  • Added "DivX" to the list of streaming agents for the layer-7 protocol detection.
  • HTTP GET requests are now sent to the high queue regardless of the class of their connection.
  • The skins can now load images with GDI+, thus supporting the formats PNG, TIFF, JPG and GIF. Images of dialogs are now in PNG format. The skins can now use XRGB 32bit bitmap files, in addition to the ARGB format.
  • Added download option for more skins in the context menu.
  • Two more languages added: Ukrainian & Vietnamese. That makes a total of 28 languages supported. Even more languages are downloadable from our web site, here: http://www.cfos.de/speed/documentation/lang.htm
  • The count of connections displayed in skin windows now by default displays the sum of TCP + UDP connections (formerly it was only TCP connections), but can be switched to either only TCP, only UDP or both by clicking on the count.
  • Global variables (accessible through "spd gset") are now written to the registry as well, so cFosSpeed can use them when booting.
  • Added l7-detection for Teredo (and Teredo bulk) IPv6 tunnelling. Thanks to Zbig for inspiration.
  • Global variable checksum_ip may now be set to 2 as well, meaning that IP checksum will only be checked on incoming packets.
  • cFosSpeed now uses link speeds as reported by Windows as upper limits. !gset variable default_reg_id is now called reg_id_default.
  • Pinging with UDP is now preferred over ICMP, if both work. UDP pinging is more reliable. This should fix Traffic Shaping not working properly with some routers.
  • "spd ports" now shows the correct port numbers. These port numbers can be used to send spd commands directly to a certain port, like "spd 1 cstat".
  • Fixed a bug in filter rules: when a protocol or program is set to non-normal priority by factory defaults and the user changed the priority to normal, it would have no effect, i.e. the factory default priority would still be used instead or the normal priority the user had set.
  • Fixed sending priority of pings. This should increase reliability of pingers.
  • cFosSpeed caused delay before sleep or hibernate.
  • The program and protocols dialogs will now automatically save their settings when you switch to another dialog page by clicking on menu on the left.
  • Fixed slow Sleep/Hibernate problems.
  • Fixed missing tracing for spd.exe and missing trace output under strange conditions in speedsrv.dll.
  • Fixed double dumping of settings to trace at the beginning of connection.
  • When uninstalling (or doing an update install), Setup will wait for the sdp.exe service to be deleted before going on. This should fix a problem where after an update install the status window is gone.
  • Switching the language did not change the language of the dialogs.
  • IPlist's were not loaded at program start, only with "spd reload -iplist".x Fixed a bug that crashed some Vista & Windows 7 systems when uninstalling.
  • Now handle_mss is 0 by default, i.e. TCP MSS is not changed by cFosSpeed. This should fix problems with some strange web sites.
  • Fixed a problem where the installer would sometimes not find old installations.
  • UDP checksum checking is now off by default.
  • cFosSpeed queues now by default outgoing data for a maximum of 1 sec instead of 3 secs. This forces TCP to adjust to line conditions faster. You can change this settings by setting "spd gset max_queue_time -save", where is measured in milliseconds.
  • Executables are now flagged to support Data Execution Prevention (DEP) and Address space layout randomization (ASLR), two security features of Windows and are now flagged to support 3GB of user space memory.
  • The reg_id = 1 (fixed) has been removed. Only 2 (cooperative) and 3 (not cooperative) remain.

New in cFosSpeed 5.13 Build 1695 Beta (Sep 9, 2010)

  • New adapter info dialog to display info about the network cards in your
  • system. There is detailed info for WLAN and WWAN. For WLAN you can
  • try to use the channel recommendation for best throughput in "crowded"
  • areas. But remember the frequency usage may change from minute to minute.
  • For WWAN (Win 7 mobile broadband adapters) you get detailed information
  • about the state of your UMTS/WCDMA/Wi-Max/etc. device.
  • New skins added: "TA Insight Skin", with Windows 7 look and real-time
  • analysis. Both traffic analysis skins now have a ping variance display and
  • a traffic shaping indicator. The ping variance display shows the variance
  • and statistical certainty of the ping times of your connection. The traffic
  • shaping indicator flashes whenever a packet is prioritized, i.e. when it is
  • sent faster than it would without traffic shaping.
  • Ingo Günther (our graphics artist) donated again a new icon skin which nicely
  • displays LAN traffic with the Net Talk feature.
  • x Fixed a bug in filter rules: when a protocol or program is set to non-normal
  • priority by factory defaults and the user changed the priority to normal, it
  • would have no effect, i.e. the factory default priority would still be used
  • instead or the normal priority the user had set. Thanks to Peter Chamberlin
  • for his bug report.
  • UDP checksum checking is now off by default.
  • Images of dialogs are now in PNG format.

New in cFosSpeed 5.13 Build 1693 Beta (Sep 9, 2010)

  • Added "DivX" to the list of streaming agents for the layer-7 protocol
  • detection.
  • HTTP GET requests are now sent to the high queue regardless of the class of
  • their connection.
  • Pinging with UDP is now preferred over ICMP, if both work. UDP pinging is
  • more reliable. This should fix Traffic Shaping not working properly with
  • some routers.
  • x Fixed sending priority of pings. This should increase reliability of
  • pingers.
  • cFosSpeed queues now by default outgoing data for a maximum of 1 sec instead of 3 secs. This forces TCP to adjust to line conditions faster. You can
  • change this settings by setting "spd gset max_queue_time -save", where
  • is measured in milliseconds.

New in cFosSpeed 5.13 Build 1692 Beta (Sep 9, 2010)

  • Fixed a bug in dialogs where the tx limit of individual programs could not
  • be saved.

New in cFosSpeed 5.13 Build 1691 Beta (Aug 7, 2010)

  • cFosspeed caused delay before sleep or hibernate. Fixed.

New in cFosSpeed 5.13 Build 1690 Beta (Aug 7, 2010)

  • The skins can now load images with GDI+, thus supporting the formats PNG, TIFF, JPG and GIF.

New in cFosSpeed 5.13 Build 1689 Beta (Aug 7, 2010)

  • The skins can now use XRGB 32bit bitmap files, in addition to the ARGB
  • format.
  • Fixed an NDIS 6 bug, causing Windows not to be able to determine the network
  • topology.
  • The program and protocols dialogs will now automatically save their settings
  • when you switch to another dialog page by clicking on menu on the left.

New in cFosSpeed 5.13 Build 1688 Beta (Aug 7, 2010)

  • Net talk packets were not properly received under Vista+ (NDIS 6). Fixed.

New in cFosSpeed 5.13 Build 1687 Beta (Aug 7, 2010)

  • Added download option for more skins in the context menu.
  • Fixed a bug where mobile broadband devices were not attached properly.

New in cFosSpeed 5.13 Build 1686 Beta (Jul 17, 2010)

  • Added log output to NDIS 6 driver

New in cFosSpeed 5.13 Build 1685 Beta (Jul 17, 2010)

  • One more language added: Ukrainian. That makes a total of 28 languages supported.
  • Fixed another NDIS 6 BSOD.
  • Hopefully fixed slow Sleep/Hibernate problems.
  • Fixed missing trace output under strange conditions in speedsrv.dll.

New in cFosSpeed 5.13 Build 1684 Beta (Jul 17, 2010)

  • One more language added: Vietnamese. That makes a total of 27 languages supported.
  • Fixed memory leak and BSOD.

New in cFosSpeed 5.13 Build 1683 Beta (Jul 17, 2010)

  • Fixed bluescreen in NDIS 6 version under Vista+.
  • Because of popular demand: option to switch off Taskbar icon is again available under Vista+.
  • Hopefully fixed annoying "Alarm" page.
  • Executables are now flagged to support 3GB of user space memory.

New in cFosSpeed 5.13 Build 1682 Beta (Jul 17, 2010)

  • Technology update: cFosSpeed is now an NDIS 6 driver for Vista and Windows 7. Thereby cFosSpeed supports the improved performance of the new network architecture.
  • Mobile Broadband Plattform of Windows 7 is now supported. So users of UMTS, WCDMA, CDMA2000, etc. equipment with native mobile broadband drivers can now enjoy the benefits of cFosSpeed Traffic Shaping.
  • Executables are now flagged to support Data Execution Prevention (DEP) and Address space layout randomization (ASLR), two security features of Windows.

New in cFosSpeed 5.13 Build 1681 Beta (Jul 17, 2010)

  • Now Teredo and Teredo_Bulk protocols are available for selection in protocols dialog.

New in cFosSpeed 5.13 Build 1680 Beta (Jul 17, 2010)

  • Fixed double dumping of settings to trace at the beginning of connection.
  • More code to detect problems with .ini temp files.

New in cFosSpeed 5.13 Build 1679 Beta (Jul 17, 2010)

  • Added code to driver to test for write/delete access in cFosSpeed directory.
  • The Taskbar icon can no longer be switched off in cFosSpeed under Vista and up. Please use the Windows dialogs to do that.

New in cFosSpeed 5.13 Build 1678 Beta (Jul 17, 2010)

  • The "Protocols" dialog in Settings now allows to set tx-limits as well. This allows you to set maximum send speeds for protocols.
  • When uninstalling (or doing an update install), Setup will wait for the sdp.exe service to be deleted before going on. This should fix a problem, where after an update install the status window is gone.
  • Added missing tracing for spd.exe.

New in cFosSpeed 5.13 Build 1677 Beta (Jul 17, 2010)

  • The count of connections displayed in skin windows now by default displays the sum of TCP + UDP connections (formerly it was only TCP connections), but can be switched to either only TCP, only UDP or both by clicking on the count.
  • Global variables (accessible through spd gset) are now written to the registry as well, so cFosSpeed can use them when booting.
  • Switching the language did not change the language of the dialogs. Fixed.
  • IPlist's were not loaded at program start, only with "spd reload -iplist". Fixed.

New in cFosSpeed 5.13 Build 1676 Beta (Jul 17, 2010)

  • Added l7-detection for Teredo IPv6 tunnelling.

New in cFosSpeed 5.13 Build 1675 Beta (Jul 17, 2010)

  • The "Programs" dialog in Settings now allows to set tx-limits per program. This allows you to set maximum send speeds for all programs.
  • Added decay of statistical data for calculation of variance after 15 minutes, so no values that are too old will be used in calculation

New in cFosSpeed 5.13 Build 1674 Beta (Jul 17, 2010)

  • Hopefully fixed a bug that crashed some Vista & Windows 7 systems when uninstalling.

New in cFosSpeed 5.13 Build 1673 Beta (Jul 17, 2010)

  • gset variable default_reg_id is now called reg_id_default.
  • The net_talk variable is now port-specific, i.e. you have to set/change it by typing "spd set net_talk...".
  • spd ports now shows the correct port numbers. These port numbers can be used to send spd commands directly to a certain port, like "spd 1 cstat".
  • Global variable checksum_ip may now be set to 2 as well, meaning that IP checksum will only be checked on incoming packets.
  • cFosSpeed now uses link speeds as reported by Windows as upper limits.
  • Now handle_mss is 0 by default, i.e. TCP MSS is not changed by cFosSpeed. This should fix problems with some strange web sites.
  • Fixed a problem where the installer would sometimes not find old installations.
  • The reg_id = 1 (fixed) has been removed. Only 2 (cooperative) and 3 (not cooperative) remain.

New in cFosSpeed 5.12 Build 1652 (Jun 3, 2010)

  • Added better detection of proxy settings to setup, so product activation should now succeed more often.
  • Four more languages added: Greek, Thai, Macedonian, Romanian.
  • That makes a total of 26 languages supported. Even more languages are
  • downloadable from our web site
  • Added gset variable dump_wshark to create dump files in Wireshark compatible format.
  • Fixed a hang problem in cfosspeed.exe. Thanks to Marco Padovan and others for dumps and tests.
  • Changes in installer that hopefully prevent some strange installation failure.
  • Fixed and updated multi-language files.
  • hta files have been renamed to .cfhta to prevent them from being started
  • interactively.

New in cFosSpeed 5.11 Build 1646 Beta (May 11, 2010)

  • Added better detection of proxy settings to setup, so product activation should now succeed more often.

New in cFosSpeed 5.11 Build 1645 Beta (May 11, 2010)

  • Changes in installer that hopefully prevent some strange installation failure.

New in cFosSpeed 5.11 Build 1644 Beta (May 11, 2010)

  • Fixed a spurious hang when installing/deinstalling.

New in cFosSpeed 5.11 Build 1643 Beta (May 3, 2010)

  • Fixes for renamed .hta files in skins.

New in cFosSpeed 5.11 Build 1642 (May 3, 2010)

  • .hta files have been renamed to .cfhta to prevent them from being started interactively.

New in cFosSpeed 5.11 Build 1641 (May 3, 2010)

  • Four more languages added: Greek, Thai, Macedonian, Romanian. That makes a total of 26 languages supported.

New in cFosSpeed 5.11 Build 1640 (May 3, 2010)

  • Added gset variable dump_wshark to create dump files in Wireshark compatible format.
  • Fixed and updated multi-language files.

New in cFosSpeed 5.10 Build 1619 (Mar 17, 2010)

  • Removed 'Ask' for dial-up connections. Traffic Shaping is now enabled
  • by default for all dial-up connections. If you don't want Traffic Shaping
  • for a particular dial-up connection, set it to 'no' in the Traffic Shaping
  • dialog.
  • Added new concept of "limit classes and filters". They are used before the
  • "regular classed and filters" are used. Thus, the firewall filters have been
  • moved to the limit filters.
  • The main difference between limit and regular classes is that -speed
  • parameter for limit classes sets a maximum send speed for packets in this
  • class. With this you can rate-limit your applications or protocols when
  • sending.
  • There is no user interface save the command line yet. To illustrate, here
  • is an example: Limit app.exe to 20000 bytes/sec:
  • spd limit class slow -speed 20000
  • spd limit filter -prog app.exe -c slow
  • Class and filter settings are automatically saved when changed and loaded
  • when cFosSpeed loads. You can use the full range of filter expressions to
  • specify which traffic should be rate-limited. See
  • http://www.cfos.de/speed/documentation/filter_expressions.shtml for the
  • documentation of filter expressions.
  • Use "spd limit help" to get a list of subcommands.
  • Added Layer-7 detection for RTMP. Thanks to Vadim for providing the
  • use-case.
  • When the browser or a plug-in like flash controls a multimedia
  • stream downloads/uploads, layer-7 analysis now classifies this as
  • a seperate protocol, called BSTREAM_C/BSTREAM_S. It is prioritized high
  • by default. Unfortunately, all downloads/uploads of video and audio
  • files are also classified as BSTREAM_C/BSTREAM_S, because they look
  • the exactly the same, so the layer-7 analysis cannot distinguish
  • between viewing or downloading a stream. If you download more
  • videos instead of watching their streams, you can set the priority
  • to low.
  • Added "spd openby" function: show you which processes have opened the
  • cFosSpeed device.
  • Minor installation improvement: If the driver is already flagged for
  • deletion, the installer will fail and prompt you to reboot.
  • Minor installation improvement: If driver installation fails, the installer
  • will try to rebuild the inf cache after cleaning old .inf/.pnf files and
  • trying again.
  • Before uninstallation, cFosSpeed setup will now close open dialog windows.
  • Added NSPlayer to the list of streaming clients, so layer-7 detection
  • finds streams even if not marked with the appropriate content-type
  • HTTP attribute.
  • We now choose to send pings to a fast responding hop, even if it is further
  • away from us than a slower one. Thanks to PULARITHA1 for inspiration.
  • Now you can switch the type of pinger with "spd pinger ", where prot
  • is "tcp", "udp" or "icmp" to the same ttl and usermode/kernelmod, but
  • different protocol.
  • Class names can now contain any character except SPACE and TAB and even
  • these characters, if you enclose the name in double quotes.
  • Added 2nd monitor support for the status window.
  • Program name lookup for connections has been sped up.
  • "spd class xxx -D" command can now delete a class even if there are still
  • filters pointing to it; the filters are then deleted as well as the class.
  • Added -pid filter expression that matches the process ID of Windows
  • processes. Please note that a process ID is only valid until the process
  • terminates. Yet, it might get re-used by a different process some time
  • later.
  • Added -pid option for "spd connections" to show the Windows process ID for
  • each connection.
  • Transparent areas in Gadget PNGs are now cut off, so the skin windows fit
  • more easily into the Gadget area.
  • Added "Traffic Analysis Icon Skin"! Thanks to our designer Ingo Guenther. :)
  • Added support for buttons in taskbar icon skins for Windows 7.
  • Added gset variable auto_burst. Setting "spd gset auto_burst 0 -save" will
  • switch off cFosSpeed's automatic burst to find the line speed when going
  • online.
  • The Traffic Analysis Skin windows now has a little line bar diagram
  • below the slot name (on the left pane) to indicate traffic for each slot
  • individually.
  • Two more languages added: Czech and Serbian (in both Latin and Cyrillic).
  • That makes a total of 21 languages supported. Even more languages are
  • downloadable from our web site, here:
  • http://www.cfos.de/speed/documentation/lang.htm
  • Skin window position is now stored for each skin. This only applies if
  • you disable "auto-arrange".
  • For whatever reason, packets of streams with l7-protocols set normal
  • priority did not "fall through" as is documented, but were set to default
  • priority right away. This has been fixed. Thanks to eXtreme for leading
  • my attention there.
  • Fixed the way cfosspeed.exe was unloaded. This could have caused problems
  • with the dialogs and system sleep / hibernate.
  • Fixed UNEXPECTED_KERNEL_MODE_TRAP (7f) EXCEPTION_DOUBLE_FAULT
  • bluescreens which could sometimes happen if many device drivers used a lot
  • of stack space. Thanks to Tony Hsieh for his kernel dump.
  • Fixed high DPC latency problems, which were reported by Infium98. This
  • could help when you notice occasional stutter of sound output.
  • Switches -dscp, -weight, -vlan-id, -vlan-prio can now be used for default
  • class as well. Thanks to vadim for bug report.
  • Fixed non-working pinger in certain setups where application layer gateways
  • or NAT solutions are used that don't honour the TTL properly. Thanks to CDH
  • for his bug report.
  • "spd filter -I" with a position that is was too high caused a crash. Fixed.
  • Fixed "spd class xxx -speed 0".
  • When bursting to find the line speed, cFosSpeed sometimes would send so much
  • data that it virtually froze the machine. Fixed.
  • Fixed bug in meta pinger that could have caused a crash.
  • Fixed range checking for "msslimit" set variable.
  • Driver all too often did not load saved settings and instead used burst to
  • determine line speed. Fixed.
  • Fixed process name resolution for Windows 7 x64.
  • Program names in connection overview are now unicode as well.
  • spd command line now works with unicode as well.
  • Fixed a bug where cFosSpeed wouldn't remember the status window position
  • (only applicable if auto-arrange is turned off).
  • cFosSpeed will not boot the pinger when shaping is switched off.
  • Daemon now handles WM_ENDSESSION correctly. Thanks to Sven Gärtner.
  • Changed HTA icon.
  • Strict RTP checking is default again. Too often regular UDP packets were
  • erroneously detected as RTP. With strict checking RTP packets must contain
  • a source ID, previously introduced by a corresponding RTCP packet. But some
  • software does not use RTCP connections, like IxChariot or VoIPBuster.
  • cFosSpeed will delete now its OEM*.inf and .pnf files after deinstallation.
  • Support for 360safety in installer.
  • Removed warn box for RAS connections in cfosspeed.dll.
  • The default maximum trace.txt file size has been increased to 1 mb.
  • The skins formerly named "cFosSpeed..." are now named "Aquarium..." :)
  • Moved installation and service functions to speedsrv.dll.
  • Added additional trace output for route detection.

New in cFosSpeed 5.03 Build 1617 Beta (Mar 11, 2010)

  • Text changes

New in cFosSpeed 5.03 Build 1615 Beta (Mar 10, 2010)

  • After registration of .cfosspeed key file Setup would hang. Fixed. This bug was introduced in build 1610.
  • Strict RTP checking is default again. Too often regular UDP packets were erroneously detected as RTP. With strict checking RTP packets must contain a source ID, previously introduced by a corresponding RTCP packet. But some software does not use RTCP connections, like IxChariot or VoIPBuster.

New in cFosSpeed 5.01 Build 1610 Beta (Feb 25, 2010)

  • Support for 360safety in installer.
  • Changes in RTMP detection.
  • Fixed the way cfosspeed.exe was unloaded. This could have caused problems with the dialogs and system sleep / hibernate.
  • Hopefully fixed UNEXPECTED_KERNEL_MODE_TRAP (7f)EXCEPTION_DOUBLE_FAULT bluescreens which could sometimes happen if many device drivers used a lot of stack space. Thanks to Tony Hsieh for his kernel dump.
  • Hopefully (again! :)) fixed high DPC latency problems, which were reported by Infium98. This could help with occasional stutter of sound output.

New in cFosSpeed 5.01 Build 1609 Beta (Feb 25, 2010)

  • Added Layer-7 detection for RTMP. Thanks to Vadim for providing the use-case.
  • When the browser or a plug-in like flash controls a multimedia stream /uploads, layer-7 analysis now classifies this as a seperate protocol, called BSTREAM_C/BSTREAM_S. It is prioritized high by default. Unfortunately, all downloads/uploads of video and audio files are also classified as BSTREAM_C/BSTREAM_S, because they look the exactly the same, so the layer-7 analysis cannot distinguish between viewing or downloading a stream. If you download more videos instead of watching their streams, you can set the priority to low.
  • Added "spd openby" function: show you which processes have opened the cFosSpeed device.

New in cFosSpeed 5.01 Build 1608 Beta (Feb 16, 2010)

  • Minor installation improvement: If the driver is already flagged for deletion, the installer will fail and prompt you to reboot.
  • Minor installation improvement: If driver installation fails, the installer will try to rebuild the inf cache after cleaning old .inf/.pnf files and trying again.
  • Before uninstallation, cFosSpeed setup will now close open dialog windows.
  • For whatever reason, packets of streams with l7-protocols set normal priority did not "fall through" as is documented, but were set to default priority right away. This has been fixed. Thanks to eXtreme for leading my attention there.

New in cFosSpeed 5.01 Build 1607 Beta (Feb 10, 2010)

  • Added NSPlayer to the list of streaming clients, so layer-7 detection finds streams even if not marked with the appropriate content-type HTTP attribute.
  • Switches -dscp, -weight, -vlan-id, -vlan-prio can now be used for default class as well. Thanks to vadim for bug report.

New in cFosSpeed 5.01 Build 1606 Beta (Jan 27, 2010)

  • We now chose a fast responding hop as pinger, even if it is further away from us. Thanks to PULARITHA1 for inspiration.

New in cFosSpeed 5.01 Build 1605 Beta (Jan 23, 2010)

  • Now you can switch the type of pinger with "spd pinger ", where prot is "tcp", "udp" or "icmp" to the same ttl and usermode/kernelmod, but different protocol.

New in cFosSpeed 5.01 Build 1604 Beta (Jan 14, 2010)

  • Class names can now contain any character except SPACE and TAB and even these characters, if you enclose the name in double quotes.
  • Removed warn box for RAS connections in cfosspeed.dll.

New in cFosSpeed 5.01 Build 1602 Beta (Jan 12, 2010)

  • Added 2nd monitor support for the status window.

New in cFosSpeed 5.01 Build 1601 Beta (Jan 8, 2010)

  • Fixed non-working pinger in certain setups where application layer gateways
  • or NAT solutions are used that don't honour the TTL properly. Thanks to CDH
  • for his bug report.

New in cFosSpeed 5.01 Build 1599 Beta (Jan 6, 2010)

  • Fixed sort order of "spd -tcpview" display.
  • "spd filter -I" with a position that is was too high caused a crash. Fixed.
  • Fixed "spd class xxx -speed 0".

New in cFosSpeed 5.01 Build 1597 Beta (Dec 29, 2009)

  • Program name lookup for connections has been sped up.
  • Hopefully fixed a bug that caused spurious crashes. This bug was introduced in build 1595.

New in cFosSpeed 5.01 Build 1596 Beta (Dec 29, 2009)

  • Removed 'Ask' for dial-up connections. Traffic Shaping is now enabled
  • by default for all dial-up connections. If you don't want Traffic Shaping
  • for a particular dial-up connection, set it to 'no' in the Traffic Shaping
  • dialog.
  • "spd class xxx -D" command can now delete a class even if there are still
  • filters pointing to it; the filters are then deleted as well as the class.
  • x Filter rules -s-iplist and -d-iplist were not available. Fixed. That bug
  • was introduced in build 1595.

New in cFosSpeed 5.01 Build 1595 Beta (Dec 29, 2009)

  • Added new concept of "limit classes and filters". They are used before the
  • "regular classed and filters" are used. Thus, the firewall filters have been
  • moved to the limit filters.
  • The main difference between limit and regular classes is that -speed
  • parameter for limit classes sets a maximum send speed for packets in this
  • class. With this you can rate-limit your applications or protocols when
  • sending.
  • There is no user interface save the command line yet. To illustrate, here
  • is an example: Limit app.exe to 20000 bytes/sec:
  • spd limit class slow -speed 20000
  • spd limit filter -prog app.exe -c slow
  • Class and filter settings are automatically saved when changed and loaded
  • when cFosSpeed loads. You can use the full range of filter expressions to
  • specify which traffic should be rate-limited. See
  • http://www.cfos.de/speed/documentation/filter_expressions.shtml for the
  • documentation of filter expressions.
  • Use "spd limit help" to get a list of subcommands.
  • Added -pid filter expression that matches the process ID of Windows
  • processes. Please note that a process ID is only valid until the process
  • terminates. Yet, it might get re-used by a different process some time
  • later.
  • Added -pid option for "spd connections" to show the Windows process ID for
  • each connection.
  • Transparent areas in Gadget PNGs are now cut off, so the skin windows fit
  • more easily into the Gadget area.
  • x Final changes to Traffic Analysis Icon Skin.

New in cFosSpeed 5.01 Build 1594 Beta (Dec 16, 2009)

  • Improved call stack usage

New in cFosSpeed 5.01 Build 1590 Beta (Dec 10, 2009)

  • When bursting to find the line speed, cFosSpeed sometimes would send so much data that it virtually froze the machine. Hopefully this is fixed now.
  • The default maximum trace.txt file size has been increased to 1 mb.

New in cFosSpeed 5.01 Build 1589 Beta (Dec 3, 2009)

  • Hopefully fixed a bug that could have hung installation. This bug was ntroduced in build 1588.
  • Fixed HTA dialogs. This bug was introduced in build 1588.
  • Fixed bug in meta pinger that could have caused a crash.
  • Fixed range checking for "msslimit" set variable.
  • Driver all too often did not load saved settings and instead used burst to determine line speed. Fixed.
  • The skins formerly named "cFosSpeed..." are now named "Aquarium..." :)

New in cFosSpeed 5.01 Build 1588 Beta (Nov 27, 2009)

  • Moved installation and service functions to speedsrv.dll.
  • Added more trace output to fix a problem where no route is found.

New in cFosSpeed 5.01 Build 1587 Beta (Nov 26, 2009)

  • Added gset variable auto_burst. Setting "spd gset auto_burst 0 -save" will switch off cFosSpeed's automatic burst to find the line speed when going online.
  • Fixed process name resolution for Windows 7 x64.

New in cFosSpeed 5.01 Build 1586 Beta (Nov 26, 2009)

  • Fixed a bug in burst code that was introduced in build 1585.

New in cFosSpeed 5.01 Build 1585 Beta (Nov 20, 2009)

  • Program names is connection overview are now unicode as well.
  • spd command line now works with unicode as well.
  • Added additional trace output for route detection.

New in cFosSpeed 5.01 Build 1584 Beta (Nov 17, 2009)

  • The Traffic Analysis Skin windows now has a little line bar diagram below the slot name (on the left pane) to indicate traffic for each slot individually.
  • Fixed a bug where cFosSpeed wouldn't remember the status window position (only applicable if auto-arrange is turned off).
  • cFosSpeed will not boot the pinger when shaping is switched off.

New in cFosSpeed 5.01 Build 1583 Beta (Nov 12, 2009)

  • Daemon now handles WM_ENDSESSION correctly.
  • Thanks to Sven Gärtner.

New in cFosSpeed 5.01 Build 1582 Beta (Nov 12, 2009)

  • Two more languages added: Czech and Serbian (in both Latin and Cyrillic).
  • That makes a total of 21 languages supported. Even more languages are downloadable from our web site, here: http://www.cfos.de/speed/documentation/lang.htm
  • Skin window position is now stored for each skin. This only applies if you disable "auto-arrange".
  • Changed HTA icon.

New in cFosSpeed 5.00 Build 1560 (Oct 31, 2009)

  • Fixed non-working pinger in certain setups where application layer gateways or NAT solutions are used that don't honour the TTL properly. Thanks to CDH for his bug report.
  • Fixed wrong colours for graphs in Traffic Analysis skin.
  • Fixed missing ML keys.

New in cFosSpeed 5.01 Build 1580 Beta (Oct 29, 2009)

  • Fixed non-working pinger in certain setups where application layer gateways r NAT solutions are used that don't honour the TTL properly. Thanks to CDH for his bug report.
  • Fixed wrong colours for graphs in Traffic Analysis skin.
  • Fixed missing ML keys.

New in cFosSpeed 5.00 Build 1559 (Oct 28, 2009)

  • New skin: cFosSpeed now comes with a "Traffic Analysis" skin, which allows fine grained real-time traffic analysis. The skin comes in two sizes: small to get a quick overview and large for detailed analysis. Each skin draws up to 10 graphs. To enable/disable a graph line click on the 'legend' button on the left border to open the left pane. Then click on the text for each colour to enable/disable the respective graph.
  • Each graph displays the value of a certain traffic "slot", where the volume of traffic of certain programs and protocols is counted. You can setup which traffic goes to which slot (and is thereby drawn by which graph) in the slot setup dialog. In this Beta version the slot dialog is sometimes hard to use, but we are improving the slot setup dialog in upcoming versions.
  • Rewrote ping engine. "Hybrid ping" is dead, long live "meta ping"!
  • The new pinger engine can make test pings to measure connection latency with ICMP (like ping), but as well with UDP and TCP; furthermore, packets can be sent from both kernelmode and usermode. All pingers operate in parallel and cFosSpeed automatically selects the best one. The reliability of the measurements is checked all the time and cFosSpeed will switch to a different pinger if one starts to fail.
  • Hopefully, this will further reduce the problems users have with misbehaving firewalls, routers and ISPs. Be sure to allow packets from spd.exe to pass through your firewall if you're asked.
  • Commands of the new ping engine:
  • pinger set the protocol and TTL for outgoing test pings
  • pingstat print ping statistics (-clear clears stats after printing)
  • pingclear clears ping statistics
  • pingboot cycle thru all pingers to find best protocol and TTL
  • sethops set the TTL for outgoing test pings
  • New and improved configuration dialogs that should be easier to use and navigate. The Usage Graph dialog now also shows the total sums of the displayed line diagrams.
  • Moved 'hide_on_fullscreen' key from the window settings configuration to the global configuration, i.e. into the [param] section of the cfosspeed.ini file. Also, due to popular demand, you can now toggle this setting in the window settings menu of the context menu.
  • New slot commands: you can set up the slots from the spd command line as
  • well. To do so, you can use the following commands. All commands begin with "spd slot ":
  • get/set name
  • get/set/add protocols
  • get/set/add programs
  • get/set mode get/set the traffic counting mode. available modes are:
  • tx, rx, max, total_tx, total_rx, total_max
  • 'max' modes display rx or tx, whichever is faster in percent
  • 'total' modes display all traffic, ignoring protocol/program settings
  • unused protocols display protocols that have not been assigned to a slot
  • unused programs display program names that have not been assigned to a slot
  • save save all slot settings to user.ini
  • reload load all slot settings from user.ini
  • Added new skin functionality: you can now draw lines and set text with arbitrary fonts in your system.
  • Improved burst code to find the line speed after install. This will happen automatically only three times after connect now. Added detection of a second traffic shaper to burst.
  • New language: Nederlands! That makes a total of 19 languages supported. Added tracking of UDP pseudo-connections counts.
  • Improved bulk detection: non bulk streams (i.e. interactive) connections must now not exceed a certain speed.
  • Added spd con -lss and -ss option to display the largest ever used segment size and all segment size values.
  • When started in compatibility mode, cFosSpeed will still know the real operating system version.
  • The skins now support system fonts for text display. Thus skin designers don't need to define their own bitmap fonts any more. Also the HISTORY method supports line drawing.
  • Added a quicker way for the minimum RTT to adapt to higher ping times.
  • Two more regulation parameters of variable shaper are now available and can be changed on the command-line: tx_dest_width and rx_dest_width. They are both counted in usec. You can change them e.g. by "spd set tx_dest_width 20000". Changes are saved on a per-port basis automatically.
  • Added gset variable dump_ascii to switch off ASCII printing of data in data dump mode.
  • Added -stat parameter to "spd tcb" command. This will print detailed traffic statistics for each TCP connection.
  • You can now configure to check if outgoing TCP segments are resends of segments that are still in the send queue. By default this check is no longer performed, since it may consume too much time for a meagre gain of some 0.1% tx bandwidth in tests here. If you want to squeeze the last bit of speed out of your connection, switch it on with "spd gset resent_in_queue 1 -save".
  • Speeded handling of out-of-sequence TCP segments. This could lessen overall CPU load by some percent and lower the memory consumption.
  • "spd cons -speed" now lists a new column: flags. Listed flags are: MSS, WSCALE, SACK, TSOPT and ECN. An upper case letter indicates that the option is in use for that TCP connection, a lowercase letter indicates the initiator of the connection tried to negotiate the option to no avail and a '-' means the option is off. See "spd cons -?" for more help.
  • IP blocklists are now also accepted in Protowall/Peerguardian format. The old format (which is still supported) was by Emule.
  • Fixed a long-standing skin bug, which caused cfosspeed.exe to sometimes
  • crash while switching skins.
  • Fixed tsclear command. It had erroneously cleared rx_limit, tx_limit and inhibit_bridged.
  • RTP detection would try to identify packets as RTP even if UDP pseudo- connection had the l7-protocol already saved. This could lead to BitTorrent UDP connections being flagged as RTP. Fixed.
  • Added workaround to avoid spurious crashes in fslx.sys (Symantec Antivirus) when booting.
  • If running as Admin a change of language would not update the .hta files. Fixed.
  • Better bulk detection for small MSS.
  • Fixed Window 7 bug in game mode
  • Fixed TCP counter "ACKs for unsent data".
  • Fixed a rare crash when dump mode was on.
  • Fixed a bluescreen under Vista when hibernating.
  • Fixed problems with game mode: under some circumstances the window would not open after it closed automatically. It should now open/close the window automatically on fullscreen - only if not opened/closed manually. And sometimes game mode changed focus. Fixed.
  • Fixed bug in usage graph display.
  • Removed NDIS status output that only filled up the trace file.
  • Added some decoding for Win7 in trace file.
  • The dialogcalibration*.htm files are now used from our server directly instead of from the distribution.

New in cFosSpeed 4.53 Build 1558 Beta (Oct 27, 2009)

  • "Reset budget" in budget dialog didn't work. Fixed.
  • More changes to the "Traffic Analysis" skin.

New in cFosSpeed 4.53 Build 1557 Beta (Oct 27, 2009)

  • Reworked Slot / Traffic Analysis dialogs. Slight changes to the new "Traffic Analysis" skin.

New in cFosSpeed 4.53 Build 1556 Beta (Oct 23, 2009)

  • New skin: cFosSpeed now comes with a traffic meter skin. It allows fine grained real-time traffic analysis. The skin comes in two sizes: small to get a quick overview and large for detailed analysis. Each skin draws up to 10 graphs. To enable/disable a graph line click on the 'legend' button on the left border to open the left pane. Then click on the text for each colour to enable/disable the respective graph.
  • Each graph displays the value of a certain traffic "slot", where the volume of traffic of certain programs and protocols is counted. You can setup which traffic goes to which slot (and is thereby drawn by which graph) in the slot setup dialog. In this Beta version the slot dialog is sometimes hard to use, but we are improving the slot setup dialog in upcoming versions.
  • New slot commands: you can set up the slots from the spd command line as
  • well. To do so, you can use the following commands. All commands begin
  • with "spd slot ":
  • get/set name
  • get/set/add protocols
  • get/set/add programs
  • get/set mode get/set the traffic counting mode. available modes are:
  • tx, rx, max, total_tx, total_rx, total_max
  • 'max' modes display rx or tx, whichever is faster in percent
  • 'total' modes display all traffic, ignoring protocol/program settings
  • unused protocols display protocols that have not been assigned to a slot
  • unused programs display program names that have not been assigned to a slot
  • save save all slot settings to user.ini
  • reload load all slot settings from user.ini
  • Added new skin functionality: you can now draw lines and set text with
  • arbitrary fonts in your system.
  • Pinger icmp_km was broken in build 1553. Fixed.

New in cFosSpeed 4.53 Build 1555 Beta (Oct 22, 2009)

  • New skin: cFosSpeed now comes with a traffic meter skin. It allows fine grained real-time traffic analysis. The skin comes in two sizes: small to get a quick overview and large for detailed analysis. Each skin draws up to 10 graphs. To enable/disable a graph line click on the 'legend' button on the left border to open the left pane. Then click on the text for each colour to enable/disable the respective graph.
  • Each graph displays the value of a certain traffic "slot", where the volume of traffic of certain programs and protocols is counted. You can setup which traffic goes to which slot (and is thereby drawn by which graph) in the slot setup dialog. In this Beta version the slot dialog is sometimes hard to use, but we are improving the slot setup dialog in upcoming versions.
  • New slot commands: you can set up the slots from the spd command line as well.
  • Added new skin functionality: you can now draw lines and set text with arbitrary fonts in your system.
  • Pinger icmp_km was broken in build 1553. Fixed.

New in cFosSpeed 4.53 Build 1553 Beta (Oct 14, 2009)

  • Fixed a crash after connection was established.

New in cFosSpeed 4.53 Build 1552 Beta (Oct 13, 2009)

  • TCP Pinger is now switched off by default. This caused sporadic TCP disconnects for some users. This was introduced in build 1545.
  • Fixed a long-standing skin bug, which caused cfosspeed.exe to sometimes crash while switching skins. Thanks to Ingo Guenther.
  • Fixed skin line drawing/text output bug with GDI+.

New in cFosSpeed 4.53 Build 1551 Beta (Oct 10, 2009)

  • Internal changes (new WDK).

New in cFosSpeed 4.53 Build 1550 Beta (Oct 9, 2009)

  • Fixed tsclear command. It had erroneously cleared rx_limit, tx_limit and inhibit_bridged.
  • RTP detecion would try to identify packets as RTP even if UDP pseudo-connection had the l7-protocal already saved. This could lead to BitTorrent
  • UDP connections being flagged as RTP. Fixed. Thanks to TheXtremeKing for data dumps.

New in cFosSpeed 4.53 Build 1549 Beta (Oct 7, 2009)

  • Improved burst code to find the line speed after install. This will happen automatically only three times after connect now. Added detection of a second traffic shaper to burst.
  • Skin bugfixes.
  • Some smaller meta pinger fixes.

New in cFosSpeed 4.53 Build 1545 Beta (Sep 29, 2009)

  • Rewrote ping engine. "Hybrid ping" is dead, long live "meta ping"! The new pinger engine can make test pings to measure connection latency with ICMP (like ping), but as well with UDP and TCP; furthermore, packets can be sent from both kernelmode and usermode. All pingers operate in parallel and cFosSpeed automatically selects the best one. The reliability of the measurements is checked all the time and cFosSpeed will switch to a different pinger if one starts to fail. Hopefully, this will further reduce the problems users have with misbehaving firewalls, routers and ISPs. Be sure to allow packets from spd.exe to pass through your firewall if you're asked.
  • New language: Nederlands! That makes a total of 19 languages supported.

New in cFosSpeed 4.53 Build 1544 Beta (Sep 24, 2009)

  • Fixed a bug in the "Traffic Shaping" dialog. When you have set traffic shaping to "on" it has actually (and erroneously) set it to "off". After installing the new version, you need to set it to the correct and desired
  • value.

New in cFosSpeed 4.53 Build 1543 Beta (Sep 21, 2009)

  • New and improved dialogs that should be easier to use and navigate.
  • Moved 'hide_on_fullscreen' key from the window settings configuration to the global configuration, i.e. into the [param] section of the cfosspeed.ini file. Also, due to popular demand, you can now toggle this setting in the
  • window settings menu of the context menu.
  • Added tracking of UDP pseudo-connections counts.
  • Game mode sometimes changed focus. Fixed.

New in cFosSpeed 4.53 Build 1542 Beta (Sep 7, 2009)

  • Improved bulk detection: non bulk streams (i.e. interactive) connections must now not exceed a certain speed.
  • Added spd con -lss and -ss option to display the largest ever used segment size and all segment size values.

New in cFosSpeed 4.53 Build 1540 Beta (Sep 4, 2009)

  • Removed NDIS status output that only filled up the trace file.
  • Added some decoding for Win7 in trace file.

New in cFosSpeed 4.53 Build 1539 Beta (Aug 29, 2009)

  • Added workaround to avoid spurious crashes in fslx.sys (Symantec Antivirus)
  • when booting.

New in cFosSpeed 4.53 Build 1537 Beta (Aug 26, 2009)

  • If running as Admin a change of language would not update the .hta files. Fixed.
  • When started in compatibility mode, cFosSpeed will still know the real operating system version.

New in cFosSpeed 4.53 Build 1536 Beta (Aug 20, 2009)

  • Slight INF file changes.

New in cFosSpeed 4.53 Build 1534 Beta (Jul 31, 2009)

  • cfosspeed.exe would not start after installation. This bug was introduced in build 1533.

New in cFosSpeed 4.53 Build 1533 Beta (Jul 30, 2009)

  • Better bulk detection for small MSS.

New in cFosSpeed 4.53 Build 1532 Beta (Jul 29, 2009)

  • The dialogcalibration*.htm files are now used from our server directly instead of from the distribution.
  • cfosspeed.exe compiles now all *_tpl.ht? into proper .ht? files, not only the ones we need and know.

New in cFosSpeed 4.53 Build 1530 Beta (Jul 29, 2009)

  • The skins now support system fonts for text display. Thus skin designers don't need to define their own bitmap fonts any more. Also the HISTORY method supports line drawing.

New in cFosSpeed 4.53 Build 1527 Beta (Jul 6, 2009)

  • Fixed Window 7 bug on game mode, thanks to Mario Schieke.
  • Fixed TCP counter "ACKs for unsent data".
  • Fixed a rare crash when dump mode was on.

New in cFosSpeed 4.53 Build 1526 Beta (Jul 2, 2009)

  • Fixed a bluescreen under Vista when hibernating.

New in cFosSpeed 4.53 Build 1525 Beta (Jul 2, 2009)

  • Added a quicker way for the minimum RTT to adapt to higher ping times.
  • Two more regulation parameters of variable shaper are now available and can be changed on the command-line: tx_dest_width and rx_dest_width. They are both counted in usec. You can change them e.g. by "spd set tx_dest_width 20000". Changes are saved on a per-port basis automatically.
  • Tried to fix game mode under Windows 7.

New in cFosSpeed 4.53 Build 1524 Beta (Jul 1, 2009)

  • Added more trace output to track problems with game mode under Windows 7

New in cFosSpeed 4.53 Build 1523 Beta (Jun 30, 2009)

  • Added two mor flags to the "spd cons -flags" display: M will show if the TCP MSS has been negotiated to more than 1400 and W will show if window scaling is active.
  • Added gset variable dump_ascii to switch off ASCII printing of data in data dump mode.
  • Added -stat parameter to "spd tcb" command. This will print detailed traffic statistics for each TCP connection.
  • Fixed problem with game mode: under some circumstances the window would not open after it closed automatically. It should now open/close the window automatically on fullscreen - only if not opened/closed manually.
  • Fixed a rare crash when dump mode was on.

New in cFosSpeed 4.53 Build 1522 Beta (Jun 26, 2009)

  • You can now configure to check if outgoing TCP segments are resends of segments that are still in the send queue. By default this check is no longer performed, since it may consume too much time for a meagre gain of some 0.1% tx bandwidth in tests here. If you want to squeeze the last bit of speed out of your connection, switch it on with "spd gset resent_in_queue 1 -save".
  • Speeded handling of out-of-sequence TCP segments. This could lessen overall CPU load by some percent and lower the memory consumption.
  • "spd cons -speed" now lists a new column: flags. Listed flags are: SACK, TSOPT and ECN. An upper case letter indicates that the option is in use for that TCP connection and a lowercase letter indicates the initiator of the connection tried to negotiate the option. See "spd cons -?" for more help.

New in cFosSpeed 4.53 Build 1521 Beta (Jun 17, 2009)

  • IP blocklists are now also accepted in Protowall/Peerguardian format. The old format was by Emule.

New in cFosSpeed 4.52 Build 1509 (Jun 3, 2009)

  • Finally added auto-hide on fullscreen to the skin window. Thanks to
  • Richard B. (dj deipotent), who provided the code for this feature.
  • cFosSpeed automatically closes the skin windows, if an application
  • (e.g. a game) switches to fullscreen mode. It opens the window after
  • fullscreen mode is exited if the last time it was opened was automatically.
  • To disable this feature, set the key "hide_on_fullscreen" in the section for
  • the respective skin window/network card in cfosspeed.ini to 0.
  • cFosSpeed can now block huge lists of IP-addresses the same way IP-Blockers
  • like Protowall and Peerguradian support them. All traffic to or from one of
  • the listed addresses is blocked. We call those lists "iplists".
  • It works like this: cFosSpeed supports these iplists through two filter
  • expressions: -s-iplist and -d-iplist. They are already set by default in
  • settings.ini.
  • The filters -s-iplist and -d-iplist accept as a second parameter an iplist
  • name. The default name used in settings.ini is "ipfilter". In the [iplist]
  • section in settings.ini or user.ini you must specify the iplist names with
  • the corresponding IP block list files that contain the IP-ranges to be
  • blocked. These block lists are not supplied with cFosSpeed.
  • An example excerpt from settings.ini:
  • filter=-tx -d-iplist ipfilter -c drop
  • filter=-rx -s-iplist ipfilter -c drop
  • [iplist]
  • ipfilter=c: extipfilter.dat
  • ipfilter=c: extmy.dat
  • This will read both files and make them available as iplist named 'ipfilter'.
  • This iplist is used by default to filter packets to the drop queue, i.e. to
  • discard them. Use "spd reload -iplist" to reload the iplists from the source
  • files.
  • See http://www.cfos.de/speed/documentation/filter_expressions.shtml#iplist
  • for more. Thanks to esz for the idea.
  • Nicer budget graphics; the usage graph can now also display the total
  • transmitted/received number of bytes. This is now the default.
  • Added support for VLAN tags. You can filter on VLAN packets with -is-vlan,
  • vlan-prio and -vlan-id filters. And you can specify VLAN priority and ID
  • to be set for each traffic class.
  • Added new global setting "bulk_detect", which is 1 by default. Switch it
  • off to prevent cFosSpeed from guessing if certain l7-protocols (like IRC,
  • Telnet, file sharing) are in bulk mode, i.e. transferring large amounts of
  • data.
  • Added -tcp-lport, -udp-lport and -lport to match local ports and -tcp-rport,
  • udp-rport and -rport to match remote ports.
  • Added help texts for global variables dump_sessions and passthru. Use e.g.
  • "spd gset passthru /?" to get help.
  • Added new filter option "-force-set-class". By setting this option in a
  • filter expression you can force cfosspeed to set the class of this filter
  • as the main class of the TCP/UDP connection this packet belongs to.
  • See http://www.cfos.de/speed/documentation/filter_expressions.shtml
  • section "RX-priorisation" for more details. Thanks to GB W for inspiration.
  • New language: Vietnamese! That makes a total of 19 languages supported.
  • Even more languages are downloadable from our web site, here:
  • http://www.cfos.de/speed/documentation/lang.htm
  • Added additional way of allocation to relieve non-paged pool.
  • x Favour ping time mode is no longer switched off with each installation.
  • Thanks to prophecy.
  • x Fixed "spd medium" command.
  • x Fixed a crash when machine wakes up from hibernation. Thanks to Eric
  • Fraser for dumps.
  • x If the cfosspeed.ini file was saved as non-unicode, it was not changed to
  • unicode later. This could cause a problem, when unicode filenames were
  • tried to save. Fixed.
  • x If the measured delay is too high the fixed shaping algorithm now lowers
  • txspeed more, even if we attained a higher speed some time before. This
  • should guard better against measurement or calculation errors.
  • x Tried to fix a psched.sys crash. Thanks to Kai for dump file.
  • x The variable shaper sent pings all the time, even if there was no traffic
  • otherwise. This has been fixed. Thanks to Octavian for the report.
  • x Expanded and fixed "spd tvstat" counters.
  • x Added more debug output when driver could not be loaded.
  • x RTP statistics were not printed when there were no RTCP sessions. Fixed.
  • x RTP detection bug fix.
  • x UDP checksum errors were counted but not printed. Fixed.
  • x UDP packets without checksum are now properly handled.
  • x Relaxed CPU load needed for program name queries on routed UDP traffic.
  • Thanks to GB W for help.
  • x Overview of active connections should have less "Unknown" program names now.
  • x Fixed potentially serious bug in interlocked handling.
  • x Now handle_mss is 0 by default, i.e. TCP MSS is not changed by cFosSpeed.
  • This should fix problems with some strange web sites.
  • When installing, cFosSpeed no longer asks for the default shaping algorithm,
  • but instead uses the variable shaper. If you want to use the fixed shaper
  • instead, you can change this setting under Settings, Preferences, Traffic
  • Shaping Mode and for each connection individually under Connections when
  • you click on the toolkit icon.
  • Added more debugging output to help finding "Driver not loaded" problems.
  • The variable strict_rtp_check is now 0 by default. If you experience
  • many unexpected RTP packets in l7-protocol detection, you may want to switch
  • it back on.
  • The global parameter dump_arp is now 0 by default.

New in cFosSpeed 4.51 Build 1508 Beta (May 29, 2009)

  • When installing, cFosSpeed no longer asks for the default shaping algorithm, but instead uses the variable shaper. If you want to use the fixed shaper instead, you can change this setting under Settings, Preferences, Traffic Shaping Mode and for each connection individually under Connections when you click on the toolkit icon.

New in cFosSpeed 4.51 Build 1507 Beta (May 29, 2009)

  • Added trace output to aid debugging a rare bluescreen.

New in cFosSpeed 4.51 Build 1506 Beta (May 11, 2009)

  • Bugfixes for gaming mode.

New in cFosSpeed 4.51 Build 1505 Beta (May 8, 2009)

  • Finally added auto-hide on fullscreen to the skin window. Thanks to Richard B. (dj deipotent), who provided the code for this feature. cFosSpeed automatically closes the skin windows, if an application (e.g. a game) switches to fullscreen mode. It opens the window after fullscreen mode is exited if the last time it was opened was automatically. To disable this feature, set the key "hide_on_fullscreen" in the section for the respective skin window/network card in cfosspeed.ini to 0.

New in cFosSpeed 4.51 Build 1504 Beta (May 5, 2009)

  • Favour ping time mode is no longer switched off with each installation

New in cFosSpeed 4.51 Build 1501 Beta (Apr 17, 2009)

  • Added new global setting "bulk_detect", which is 1 by default. Switch it off to prevent cFosSpeed from guessing if certain l7-protocols (like IRC, Telnet, file sharing) are in bulk mode, i.e. transferring large amounts of data.
  • Added -tcp-lport, -udp-lport and -lport to match local ports and -tcp-rport, -udp-rport and -rport to match remote ports.
  • Fixed "spd medium" command.

New in cFosSpeed 4.51 Build 1499 Beta (Apr 8, 2009)

  • Fixed problems with memory allocation

New in cFosSpeed 4.51 Build 1498 Beta (Apr 6, 2009)

  • Tried to fix a crash when machine wakes up from hibernation. Thanks to Eric
  • Fraser for dumps.

New in cFosSpeed 4.51 Build 1497 Beta (Apr 6, 2009)

  • In preferences you can now set the source block list file for the 'ipfilter' iplist that is used by default to filter packets.
  • When a iplist has become empty (i.e. because the source block list file has been removed from the [iplist] section), the iplist is now unloaded from memory.
  • Reloading the blocker list files will now reload filters on all ports to reflect the change.

New in cFosSpeed 4.51 Build 1496 Beta (Apr 6, 2009)

  • Added code for post mortem debugging.

New in cFosSpeed 4.51 Build 1495 Beta (Apr 1, 2009)

  • Fixes for "spd reload -iplist".
  • Fixed default iplist rules in settings.ini to not block packets from/to our own subnet.
  • Added out-of-memory handling while loading iplists.

New in cFosSpeed 4.51 Build 1494 Beta (Mar 31, 2009)

  • cFosSpeed can now block huge lists of IP-addresses like IP-Blockers Protowall and Peerguradian support them. It works like this: cFosSpeed supports these lists through two filter expressions: -s-iplist and -d-iplist. They are already set by default in settings.ini. The iplist filters -s-iplist and -d-iplist accept as a second parameter a list name. The default name used in settings.ini is "ipfilter". In the [iplist] section in settings.ini or user.ini you must list the list names with the corresponding IP block list files that contain the IP-ranges to be blocked. These block lists are not supplied with cFosSpeed.
  • Fixed budget graph bug.

New in cFosSpeed 4.51 Build 1492 Beta (Mar 25, 2009)

  • Added help texts for global variables dump_sessions and passthru. Use e.g. "spd gset passthru /?" to get help.
  • If the cfosspeed.ini file was saved as non-unicode, it was not changed to unicode later. This could cause a problem, when unicode filenames were tried to save. Fixed.
  • If the measured delay was too high the fixed shaping algorithm now lowers the txspeed more, even if we attained a higher speed some time before. This should guard better against measurement or calculation errors.
  • The variable strict_rtp_check is now 0 by default. If you experience many unexpected RTP packets in l7-protocol detection, you may want to switch it back on.

New in cFosSpeed 4.51 Build 1491 Beta (Mar 20, 2009)

  • Added new filter option "-force-set-class". By setting this option in a filter expression you can force cfosspeed to set the class of this filter as the main class of the TCP/UDP connection this packet belongs to.
  • Fixed potentially serious bug in interlocked handling.
  • Now handle_mss is 0 by default, i.e. TCP MSS is not changed by cFosSpeed. This should fix problems with some strange web sites

New in cFosSpeed 4.51 Build 1489 Beta (Mar 17, 2009)

  • New language: Vietnamese! That makes a total of 19 languages supported. Even more languages are downloadable from our web site
  • Relaxed CPU load needed for program name queries on routed UDP traffic. Thanks to GB W for help.
  • Overview of active connections should have less "Unknown" program names now.
  • Fixed a crash when loading x64 version of cFosSpeed. Thanks to Szymon Haiduk for the dump file.

New in cFosSpeed 4.51 Build 1488 Beta (Mar 16, 2009)

  • Fixed bug in dialogs introduced in build 1487.

New in cFosSpeed 4.51 Build 1487 Beta (Mar 16, 2009)

  • Nicer budget graphics; the usage graph can now also display the total transmitted / received number of bytes. This is now the default.
  • Added additional way of allocation to relieve non-paged pool.
  • Expanded and fixed "spd tvstat" counters.
  • Added more debug output when driver could not be loaded.

New in cFosSpeed 4.51 Build 1486 Beta (Mar 9, 2009)

  • RTP statistics were not printed when there were no RTCP sessions. Fixed.

New in cFosSpeed 4.51 Build 1485 Beta (Mar 9, 2009)

  • RTP detection bug fix.
  • UDP checksum errors were counted but not printed. Fixed.
  • UDP packets without checksum are now properly handled.

New in cFosSpeed 4.51 Build 1484 Beta (Mar 9, 2009)

  • The global parameter dump_arp is now 0 by default.

New in cFosSpeed 4.51 Build 1483 Beta (Mar 5, 2009)

  • Fixed bug in handling of out-of-memory.

New in cFosSpeed 4.51 Build 1481 Beta (Feb 20, 2009)

  • Changed compiler settings to aid debugging.

New in cFosSpeed 4.51 Build 1480 Beta (Feb 16, 2009)

  • The variable shaper sent pings all the time, even if there was no traffic otherwise. This has been fixed.

New in cFosSpeed 4.50 Build 1456 (Feb 10, 2009)

  • Added new skin: "LC History"; it's like our well-known Liquid Crystal skin,
  • but with a history that scrolls to the left.
  • Added Layer-7 detection for large HTTP downloads (client & server).
  • HTTP transfers which take more than 1 sec. at full speed are now
  • classified as HTTP_C_BULK / HTTP_S_BULK and have low priority as
  • default. You can change the priority in the Layer-7 Protocol prioritization
  • dialog. Warning: This will only work, if the current HTTP connection
  • is not reused by the browser. Otherwise the first classification
  • will be used. The next version will remove this limitation.
  • Speeded memory allocation.
  • Improved detection of packets that NDIS sends erroneously to cFosSpeed.
  • x Added better handling of multiple but different SYN segments and improved
  • recovery after ACK for unsent data. Thanks to khashayar zayyani for help.
  • x Fixed a crash with Cisco Systems VPN Client. Thanks to Hardi Trenkel for
  • crash dump file.
  • x Adapters were sometimes unbound too fast, which caused Windows problems.
  • Fixed.
  • x It seems some networks trash the Ping IP packet when they return it to the
  • sender and cFosSpeed couln't find the replies in its lists. Thus, we
  • relaxed the check a bit. Thanks to Deepak for bug report.
  • x Tried to fix problem with socket error sending pings that caused ping
  • balloons. Thanks to yen linh for report.
  • x Fixed a bug where cFosSpeed would not properly reset the 'bridged'
  • setting when the router resets while cFosSpeed is running. Thanks to 4wd
  • for bug report and testing.
  • x Sometimes HTTP, SSL and SSH non-BULK l7-protocols would stay on default
  • priority even if the l7-protocol priority was set to high. Fixed. Thanks
  • to mumia for bug report.
  • x Fixed a crash under Vista that would close spd.exe. Thanks to SyntaX.
  • x Fixed x64 installer: now it pops up UAC dialog under Vista to make you full
  • Admin. This bug was introduced in build 1433.
  • x Fixed some Windows object security problems.
  • x L7 protocols SSL_C, SSL_S and SSH sometimes switched between _BULK and
  • regular versions periodically. This has been amended.
  • Removed obsolete NDIS handler.
  • Removed speed.gadget from distribution. It can now be downloaded from
  • our website.

New in cFosSpeed 4.24 Build 1420 (Jul 4, 2008)

  • The saved "spd dump -save" setting was never read. Fixed.

New in cFosSpeed 4.06 Build 1353 Final (Oct 30, 2007)

  • Variable shaper will regain full speed quicker after it slowed down when congestion was detected.
  • Certain WLAN line status codes are no longer logged to trace file. This should help in keeping the trace file small and readable.
  • Some network adapters don't notify cFosSpeed about route changes. You can now notify it manually by the new context menu option "re-detect routes".
  • Historical maximum speeds no longer fall for the moment. It caused too much problems.
  • cFosSpeed window would stay open on a WAN connection even if you set it not to shape the connection. Fixed.

New in cFosSpeed 4.03 Build 1336 (Sep 6, 2007)

  • You can now even set a more limited subnet mask override (see subnet_override). Thanks to Zyw for inspiration.
  • Added "spd cperf" command to switch on or off class traffic dumping. By setting "spd cperf on" cFosSpeed will dump about once per second how many bytes were sent in what priority class. This can help in testing filter rules or finding performance problems.
  • When cFosSpeed is sending slow because of tx congestion and that congestion goes away, cFosSpeed will now return to its old tx speed quicker.
  • Historical maximum speeds can now fall as well, if your line gets slower (because its bandwidth isn't fixed or because your speed was switched down).
  • x UDP program name detection was broken since build 4.01.1308. Fixed.
  • The "no pings" balloon will now appear later, i.e. the number of pings that must be missing for this balloon to appear is higher now.
  • FTPDATA protocol can now be set to high or higher priority, regardless of its packet sizes.
  • Removed tracing of minimal RTT ping packets.

New in cFosSpeed 4.03 Build 1334 Beta (Sep 5, 2007)

  • Added "spd cperf" command to switch on or off class traffic dumping
  • When cFosSpeed is sending slow because of tx congestion and that congestion goes away, cFosSpeed will now return to its old tx speed quicker
  • Historical maximum speeds can now fall as well, if your line gets slower (because its bandwidth isn't fixed or because your speed was switched down)

New in cFosSpeed 4.02 Build 1312 (Aug 10, 2007)

  • Added rx-priorisation. It works as follows:
  • Each class (high, default, low, lowest) has a weight assigned. Furthermore, all TCP streams are mapped to a certain class (this only applies for bulk data; e.g. ACKs are always sent out in the higher class), according to filter rules. The class weight is used when TCP windows for rx-shaping are computed. A TCP stream with weight 100 gets a window that is about 4 times bigger than a stream with weight 25. This should *usually* translate into more speed on that stream, but not necessarily (e.g. the sending server might not be fast enough).
  • The pre-set weights are: class high -weight 400 class default -weight 100
  • class low -weight 25 class lowest -weight 6
  • I.e. regular browser downloads (class default) should get about 16 times the speed than Torrents (class lowest).
  • The weighting needs some time (some seconds) to be through, so a newly created higher-than-average TCP stream needs these seconds to come to full speed.
  • Now UDP checksums are checked as well.
  • New language: Russian. That makes a total of 17 languages supported.
  • Added "spd timerstyle" command to query (just "spd timerstyle"), set "spd timerstyle " or list supported values ("spd timerstyle -?").
  • Changes to timerstyle are only active after a restart of cFosSpeed.
  • Added layer-7 protocols SSL_S_BULK, SSL_C_BULK and SSH_BULK. Switching of sessions between bulk and regular mode is done automatically based on speed and packet sizes. Thanks to ghorvath for inspiration.
  • Added gset variable fwlog. Setting it to 0 ("spd gset fwlog 0 -save") will disable fwlog.txt logging of firewalled packets. Thanks to danny for inspiration.
  • Straightened evaluation of which filter rules determine the class of a connection. Now rules like -tcp-dport, etc. work as well. The third column of a "spd filter" output is 'c' for rules that set the class.
  • "spd reset_budget" without specifying a budget number now resets the current budget.
  • x Fixed warning that is displayed if too many connections cause rx-shaping to be inefficient. It was displayed regardless of the number of connections.
  • x Fixed a problem where downloads would be slowed too much. Thanks to FR.
  • x FTPS (FTP with SSL, FTP with TLS) command sessions are now identified as FTPCMD in layer-7 detection. Thanks to ghorvath.
  • x Switching the medium no longer changes the shaping algorithm. This was unintuitiv. If you want a different shaping algo (variable/fixed) you now have to switch it manually.
  • Streamlined some code in search of obnoxious "slow LAN copy" bug. Thanks to Steve Coolen for his help.
  • Module "ackfilter" is now disabled by default. Set "ackfilter=1" in section [param] in cfosspeed.ini to enable it again. This does only switch off the filtering of presumably superfluous TCP ACKs, not the regular priorisation of TCP ACKs.
  • cFosSpeed service is no longer flagged interactive. Please inform us if something doesn't work as expected.

New in cFosSpeed 4.00 Build 1283 (Jun 19, 2007)

  • Major New Feature: Multi-User Version finally available!
  • Now you can use cFosSpeed on several PCs connected to one router. Also a new Traffic Shaping algorithm is available for users with variable bandwidth. The installer lets you specify the type of broadband connection you have:
  • fixed bandwidth: Your connection has fixed bandwidth and you either use it exclusively or all Internet traffic is routed through your PC.
  • variable bandwidth with cooperation: Either your connection has variable bandwidth and/or you use it with several PCs simultaneously (with cFosSpeed installed on each PC).
  • variable bandwidth without cooperation: Same as above, however at least one computer has no cFosSpeed Traffic Shaping.
  • Settings: "fixed bandwidth" allows lowest ping times, followed by variable bandwidth with cooperation. However, if you have no influence on the computers connected to the broadband connection, use variable bandwidth without cooperation.
  • For best performance, calibrate each computer independently, i.e. while no other computer uses the available bandwidth.
  • Now you can set MAXimum rx-speed and tx-speed!
  • You can set it under Options / Settings / Preferences.
  • Or, just use "spd set rx_limit " resp. "spd set tx_limit ". The value is in bytes as cFosSpeed calculates them. This might be up to some percent more than what your software shows you. It's best to look at maxrx resp. maxtxraw ("spd set maxrx" resp. "spd set maxtxraw") and then set the limit accordingly. The value is automatically saved. To set no limit, set it to "inf" (like "spd set rx_limit inf").
  • The tx_limit is quite accurate, but the rx_limit is only met statistically,i.e. it's possible you receive more than the limit, but shortly afterwards you'll receive less
  • It is a good idea to give your client one full blast upload and download before setting one of those limits. Otherwise, it will have problems calculating, because it doesn't know the "true" line speeds.
  • Now you can display the class most packets of TCP connections and UDP pseudo- connections are classified to (higher, high, default, low or lowest). Use "spd cons -class" or -show:c, -addshow:c or -sort:c options. See other "cons" or "-sort:" entries here in whatsnew.txt for more details.
  • The "current connections" dialog show the class as well.
  • cFosSpeed now has support to send ping messages from both usermode and kernelmode, named "hybrid ping". This should hopefully help with some firewalls that are difficult to configure or have problems with spd.exe sending ICMP messages. cFosSpeed will switch between usermode and kernel mode ping at the beginning of a connection to ensure pings are coming through.
  • Added additional column with MSS to "spd cons". It is included in"spd -speed", can be added with "-mss" option and has the column key 'm'for -show, -addshow resp. -sort parameters.
  • Added additional columns for average tcp segment size (ass) to "spd cons". They are included in "spd -speed", can be added with "-ass" option and have the column keys 'a' for tx ass and 'A' for rx ass for how, -addshow resp.
  • sort parameters.
  • Added a proper "spd cons -?" help screen.
  • New filter rules -tcp-seq and -tcp-cnt to match on bytes of sequence space transmitted or number of packets in this connection, respectively. Thanks to pogowurst for inspiration.
  • Added a warning that is displayed if too many active connections cause rx-shaping to be inefficient. This can be disabled with "spd gset balloon_many_cons 0 -save".
  • Recoded RX-shaping. cFosSpeed should now work much better with very many connections, like with BitTorrent.
  • Added more debug output when cfosspeed.sys can not be loaded.
  • New language: Brazilian Portuguese. That makes a total of 16 languages supported.
  • Added manual configuration option to change the subnet mask (only applies if you use a router). This is needed if you have more than one router and use them cascaded.
  • FosSpeed already knows the network interface that is used to send data to the Internet and it got the subnet mask OF YOUR SUBNET. But if you use multiple routers it doesn't know about the subnet mask of the next-hopsubnet. So you can specify a BROADER subnet mask (i.e. with less 1's) manually.
  • To do that add the MAC address of the router to section [subnet_override] in cfosspeed.ini, followed by an equal sign and the desired new subnet mask,like this: [subnet_override]11:22:33:44:55:66=255.255.0.0
  • If you don't know the MAC address of your router, use "spd ports". It's the router_mac value. Thanks to TSE for inspiration.
  • Changing l7-protocol priority to "Normal" didn't work. Fixed.
  • Fixed two possible causes for non-MSS aligned RWINs.
  • Fixed a problem under Vista where budget and skin settings would not be written to disk after modification.
  • Usage graph didn't work with user rights under Vista. Fixed.
  • Fixes in rx-shaping for slow speeds (like ISDN).
  • Fixed a rare problem with license keys when re-installing cFosSpeed.

New in cFosSpeed 3.22 (Mar 14, 2007)

  • New feature
  • Minor improvement
  • Software-change requires modification of your configuration
  • Bugfix
  • Information only

New in cFosSpeed 3.11 Build 1175 (Aug 22, 2006)

  • When IP addresses where added/deleted/changed to/from the netword card the cFosSpeed port and window closed. Fixed.
  • Deleted IP addresses were sometimes not transferred correctly to the driver. This could lead to cFosSpeed ignoring all data packets. Fixed.
  • After install, cFosSpeed installer will check if driver is running. If not, install will be aborted with an error. This should make installation problems better visible.

New in cFosSpeed 3.01 Build 1149 (Jul 27, 2006)

  • Added better debug trace possibilities if driver doesn't load.
  • Scaling of usage graph is now better readable.
  • Usage data by protocol for DC_* is now added into DIRECTCONNECT, for E2K_* info E2K.
  • Sometimes a "No Pings" balloon was shown too early. Fixed.

New in cFosSpeed 3.01 Build 1139 (Jun 26, 2006)

  • Fixed for Dial-Up connection for Windows Vista Beta 2.
  • Fixed Kademlia detection.
  • Fixed some script errors.