I2P Changelog

What's new in I2P 2.5.0

Apr 10, 2024

Changes:
I2PTunnel: Implement support for Keepalive/Server-side Persistence
Susimail: Add markdown support for formatted plain-text content
Susimail: Add HTML Email support
I2PSnark: Add search capability
I2PSnark: Preserve private=0 in torrent files
Data: Store compressed RI and LS
Bug Fixes:
Susimail: Fix handling of forwarded mail with attachments
Susimail: Fix handling of forwarded mail with unspecified encoding
Susimail: Fix forwarding of HTML-only email
Susimail: Bugfixes in presentation of encoded attachmments, mail body
I2PSnark: Handle data directory changes
SSU2: Cancel peer test if Charlie does not have B cap
SSU2: Treat peer test result as unknown if Charlie is unreachable
Router: Filter additional garlic-wrapped messages
I2CP: Prevent loopback messages to same session
NetDB: Resolve Exploratory/Router isolation-piercing event
Other:
API 0.9.62
Translation updates

New in I2P 2.4.0 (Dec 19, 2023)

New in I2P 2.3.0 (Jun 30, 2023)

New in I2P 2.2.1 (Apr 14, 2023)

New in I2P 2.2.0 (Mar 14, 2023)

New in I2P 2.1.0 (Jan 11, 2023)

New in I2P 2.0.0 (Nov 22, 2022)

New in I2P 1.9.0 (Aug 22, 2022)

New in I2P 1.8.0 (May 24, 2022)

New in I2P 1.7.0 (Feb 22, 2022)

New in I2P 1.6.1 (Dec 2, 2021)

New in I2P 1.5.0 (Aug 25, 2021)

New in I2P 0.9.50 (May 18, 2021)

New in I2P 0.9.47 (Dec 1, 2020)

New in I2P 0.9.46 (May 25, 2020)

New in I2P 0.9.45 (Feb 26, 2020)

New in I2P 0.9.43 (Oct 24, 2019)

New in I2P 0.9.42 (Aug 28, 2019)

New in I2P 0.9.39 (Mar 21, 2019)

New in I2P 0.9.38 (Jan 23, 2019)

New in I2P 0.9.37 (Oct 5, 2018)

New in I2P 0.9.36 (Aug 24, 2018)

New in I2P 0.9.35 (Jun 27, 2018)

New in I2P 0.9.34 (Apr 11, 2018)

New in I2P 0.9.33 (Jan 30, 2018)

New in I2P 0.9.32 (Nov 12, 2017)

New in I2P 0.9.31 (Aug 8, 2017)

New in I2P 0.9.29 (Mar 3, 2017)

New in I2P 0.9.28 (Dec 15, 2016)

New in I2P 0.9.27 (Oct 21, 2016)

New in I2P 0.9.26 (Jun 7, 2016)

New in I2P 0.9.25 (Mar 23, 2016)

New in I2P 0.9.24 (Jan 30, 2016)

New in I2P 0.9.23 (Nov 20, 2015)

New in I2P 0.9.22 (Sep 14, 2015)

New in I2P 0.9.21 (Aug 3, 2015)

New in I2P 0.9.20 (Jun 3, 2015)

New in I2P 0.9.19 (Apr 14, 2015)

New in I2P 0.9.17 (Dec 2, 2014)

New in I2P 0.9.16 (Nov 13, 2014)

New in I2P 0.9.15 (Sep 22, 2014)

New in I2P 0.9.14.1 (Aug 11, 2014)

New in I2P 0.9.14 (Jul 28, 2014)

New in I2P 0.9.13 (May 23, 2014)

New in I2P 0.9.12 (Apr 1, 2014)

New in I2P 0.9.11 (Feb 10, 2014)

New in I2P 0.9.10 (Jan 27, 2014)

New in I2P 0.9.9 (Dec 9, 2013)

New in I2P 0.9.8.1 (Oct 3, 2013)

New in I2P 0.9.8 (Oct 1, 2013)

New in I2P 0.9.7.1 (Aug 12, 2013)

New in I2P 0.9.7 (Jul 18, 2013)

New in I2P 0.9.6 (Jul 18, 2013)

New in I2P 0.9.5 (Jul 18, 2013)

New in I2P 0.9.4 (Dec 18, 2012)

New in I2P 0.9.3 (Oct 29, 2012)

New in I2P 0.9.2 (Oct 23, 2012)

New in I2P 0.9.1 (Oct 23, 2012)

I2PSnark:
Fix several bugs in downloading torrents with skipped files
Fix places where rarest-first was not honored
Fix handling of encoded magnet links
Additional inbound connection limits
Immediate closing of connections with handshake errors
Blocklist peers with multiple handshake errors
Delay "ballooning" files on disk until required, to speed torrent adds
Store partial pieces in temp files to greatly reduce memory usage when leeching
Remove peers restriction when leeching torrents with large pieces
Improve configuration of open and private trackers
Prevent configuratino of default trackers as private
Improved display and control of torrent file downloads
Reduced number of threads
Faster startup and shutdown of torrents
Allow clearing of message box
New light theme
Torrent info page updates and cleanups
Fix problems with restarted torrents
Delay tunnel close at shutdown to ensure trackers are notified
Better UI behavior during tunnel startup and shutdown
Bug Fixes:
Prevent shutdown hangs caused by buggy plugins
Fix for Raspberry Pi crashing
Fix rare job queue hang
Fix routing key modifier rarely not updating at midnight
Fix excessive padding in some AES-encrypted messages
Fix occasional gunzip failures
Several fixes to streaming lib to speed recovery after dropped packets and improve retransmit behavior
Fix bug that reduced reuse of tunnels
Other:
Ports are now passed through the SOCKS and HTTP proxies to support eepsite virtual hosts. See http://zzz.i2p/topics/1182 for setup instructions.
I2PTunnel configuration changes now take effect immediately. No tunnel restart required.
Summary bar iframe removed, refresh is now via Javascript only
Reduce netDB flood redundancy
Reduce stats publishing frequency
Minor router console changes
New Hungarian and Greek translations
Completed Italian translation
Updates to Dutch, Finnish, French, German, Spanish, and Swedish translations
Update geoip to Maxmind 2012-07-04
Theme updates
Theme support for SusiMail and SudiDNS; new dark themes
I2PTunnel and SusiDNS now iframed with summary bar
Console home page now shows news summary in summary bar
Console home page icon updates
Console summary bar now configurable
Change the HTTP proxy error code from 404 to 500
Cleanups for efficiency in netdb and I2CP
Increase timeout for internal uses of eepget to improve reliability

New in I2P 0.9 (Oct 23, 2012)

New in I2P 0.8.13 (Feb 29, 2012)

New in I2P 0.8.12 (Feb 17, 2012)

Release Details:
This release contains several big changes that should help network reliability and performance.
The first two changes are fixes for major UDP packet transmission bugs, described below. The third change is fixes to the decompressor. Fixing these should eliminate a big source of message delivery failures.
Also, the release contains a rewrite of the router's participating traffic congestion control. It should now more accurately measure current participating bandwidth, handle bursts better, drop messages less, and drop the right messages if dropping is required.
Also, the release reduces the amount of processing that routers do for messages they pass down the tunnel. These messages do not need to be completely parsed and validated since the gateway is simply passing them through. This will help performance of all routers but the improvement will probably not be noticeable except on high-traffic routers.
We're optimistic that these changes will help, and of course eliminating sources of message corruption is sure to help. However the extend of the improvement won't be apparent until the majority of the network upgrades.
The release also contains some updates to the router console light theme. You may need to do a shift-reload or control-reload in your browser to force a reload of the CSS.
Major changes:
Instead of fully parsing and validating messages received at the inbound gateway, simply pass them down the tunnel
Don't verify I2NP checksums in most cases, as message corruption is caught at other layers
Don't recalculate I2NP checksums on messages passed through unchanged
Several NTCP pumper optimizations, to hopefully fix NTCP pumper high CPU usage on fast routers
Rewrite participating tunnel congestion control, to drop less, more accurately measure traffic, and handle bursts better
Wrapper Update:
New installs include wrapper version 3.5.13 which fixes a heap corruption with very long log lines. See http://wrapper.tanukisoftware.com/doc/english/release-notes.html for additional information. I2P PPA package users should have received this update in the last week of December. If you do not use our PPA package and would like to update your wrapper manually, follow the instructions at http://www.i2p2.de/manualwrapper .
Bug Fixes:
Fix major SSU MTU bug introduced in 0.8.9.The router sometimes sent UDP packets that exceeded the maximum size that routers would accept on the receive side. This resulted in a lot of dropped packets, tunnel build problems, and connection problems. One thing that contributed to us missing the problem was that 0.8.9 was released in the middle of the huge network expansion in early October, when network performance was already deteriorating rapidly.
Fix major SSU fragmentation bug present since 2005. UDP corrupted transmit messages when the message size was an exact multiple of the fragmentation size.
Fix major decompression bugs present since 2005 that caused message corruption and data loss at multiple protocol layers.
Snark doesn't always delete directories
Fix all character case conversion (Turkish four i problem)
Whitelist more IRC commands
Remove expired reseed cert
Other:
Speed up the inefficient GeoIP lookup
Optimize several heavily-used utility functions
Don't drop the transport connection when receiving an invalid message, it isn't necessary and could be an attack vector
Console light theme update
Move the complex network configuration stuff to a new console page
Add a link to hide the news in the console
Allow numerous additional IRC commands through the IRC filter
Several other cleanups, optimizations, and object caches added
New Estonian translation (thanks ajutine)
Spanish, Swedish, Ukrainian translation updates

New in I2P 0.8.2 (Jan 5, 2011)

New in I2P 0.8.1 (Jan 5, 2011)

New in I2P 0.8 (Aug 27, 2010)

New in I2P 0.7.13 (May 11, 2010)

New in I2P 0.7.6 (Jul 31, 2009)

I2P version 0.7.6 contains additional fixes for network stability issues related to tunnel building and connection limits. While the 0.7.5 release greatly improved the congestion that appeared UTC evenings and weekends, it was not eliminated; this release should improve the situation further.
This version also has new console themes by dr|z3d, which may be selected on the new UI configuration page. Sorry, the new themes are not available for IE browsers.
The default tunnel length variance is changed from 1 to 0. This mainly affects exploratory tunnels and iMule. As explained on zzz.i2p, a non-zero variance adds very little protection, at great cost in resources. Should you wish to reconfigure your exploratory settings back to the old variance of 1, or change to length 3 variance 0, you may do so on the config tunnels page. iMule settings are best changed within that application.
I2P now stores temporary data in the system temp directory (generally /var/tmp on Linux and %TEMP% on Windows). For new installs only, user data is in $HOME/.i2p on Linux/Mac and %APPDATA%I2P on Windows.
The release contains several changes to reduce resource usage (memory, CPU, and connections) and the usual assortment of bug fixes. Upgrading is recommended.
This is the first release built and signed by zzz. Thanks again to Complication for his many contributions to the project over the past five years. I2P is undergoing the most rapid development in years. Please give the developers feedback on IRC #i2p or forum.i2p2.de and get involved!
Release details:
Connection Limits and related congestion
Split the limiting actions into three thresholds (75%, 81%, and 87%) instead of all happening at 80%, for better control, and to save the drastic actions for the higher thresholds.
Other minor changes, perhaps temporary, to improve tunnel build success.
Change default tunnel length variance to zero, to help iMule and exploratory build success. As explained elsewhere on this site, this will have a negligible affect on anonymity. Should you wish to keep a variance of 1 for a particular tunnel pool, change it back on configtunnels.jsp or in i2ptunnel, or the iMule config.
Make shared clients tunnels reduce-on-idle for new installs.
Resources
Expire peer profiles quicker and display less, to reduce memory use.
Use StringBuilder throughout, faster than StringBuffer
Reduce stats coalesce frequency, this is a big CPU user
Allocate much less memory on first startup
Remove more unused classes
Transport
More fixes related to UPnP, recognition of firewalls and changing firewall conditions, and address changes.
Browser Launcher
Wait until the console is up before launching browser.
Console and Themes
New console, i2psnark, susimail, susidns, and proxy error page themes by dr|zed
Console themes are selectable on configui.jsp.
Console themes not available for IE users.
Fixes for Opera
Proxy
Serve css and image files at the reserved proxy.i2p address, to better display the error pages when the user is on a different machine.
Installer, Split Directories, Distro-Friendly Organization
For new installs, code and data will be split into different directories. Data (router files, config files, i2psnark files, eepsite files, etc.) will be in ~/.i2p on linux and %APPDATA%I2P on Windows. The code directory can be read-only to the user (although the user will not be able to update in that case). On linux, the shell scripts i2prouter, runplain.sh, and eepget can be moved to a directory such as /usr/bin. All assumptions that files are in the current working directory are removed. Don't launch the router anymore in the install scripts on linux.
For existing installs, about the only visible change will be a few temporary files now in the Java temporary directory (e.g. /var/tmp on linux) instead of $I2P.
Reseeder
Move the reseeder from the routerconsole to the router, for easier embedding of the router in other code (e.g. android, iMule)
SHA256 Checksums:
6d5d3b9feee1f827e25c896bdc12553a5133816e0bf705a5d9dffe099685245a i2pinstall_0.7.6.exe
05c16c78670ebcadb401509a0b46010e8d3ef2644bce3bc62f96751368e24402 i2psource_0.7.6.tar.bz2
e799ef916871c12d0c53ade577fe2ab89feb138589b9dd312a38f35f31c45bff i2pupdate_0.7.6.zip
e4605534e5accec9956c2204c547486ad5a3cca57597f2a44665c49cdf9dede3 i2pupdate.sud

New in I2P 0.75 (Jul 8, 2009)

I2P version 0.7.5 foremost addresses network stability issues by adjusting how exploratory tunnels are built if a router nears its connection limit, and also by distinguishing between connected peers and other non-failing peers while picking them for inclusion in tunnels.
This version also delivers fixes to installer behaviour on Windows, to the Router Console, NTCP transport and UPnP mechanism.
Additionally, version 0.7.5 changes the "news.xml" file location where I2P routers check whether a new version is available. Instead of the old URL (http://complication.i2p/news.xml) a new location (http://echelon.i2p/i2p/news.xml) will be used. If your router uses default updater settings, it will start using the new URL automatically. If not, you will need to visit "configupdate.jsp" on the Router Console, and change it manually.
For a while after this update, the old news.xml location also redirects all HTTP requests to the new one. This is because I need to withdraw from the I2P projest.
The reasons for my withdrawal have nothing to do with I2P, and I wish the very best to you all. Oppositely, the reasons have everything to do with my "real-life" identity, events which I could not foresee (neither good nor bad, but unavoidable) and my plans for future.
This update removes my public key from the list of trusted release signing keys, and the next release will be signed by zzz instead. If you have non-default updater settings in force, you may want to remove my key manually. This is easily accomplished by visiting "configupdate.jsp" on the Router Console, and removing the key line starting with the characters "JHFA".
As customary, for people who don't have the option of checking GPG signatures, supplied below are the SHA1 hashes of released files. Please note that the "i2pheadless" installer is no longer generated:
14c0e89f9d3e980607e6eb2cbea2a61bafcf4e5c i2pinstall-0.7.5.exe
9137ef908a68145e558a21e8411435867e8daa2f i2psource-0.7.5.tar.bz2
5b3fed888e5236f1c555d36e1e8c23003e6b5d64 i2pupdate-0.7.5.zip
d783a091024ec87e48aad83d1e12f0d9fc1d58c7 i2pupdate.sud

New in I2P 0.7 (Feb 5, 2009)

New in I2P 0.6.4 (Oct 9, 2008)

New in I2P 0.6.3 (Aug 28, 2008)