GNU Gatekeeper

The GNU Gatekeeper (GnuGk) is a H.323 gatekeeper, available freely under GPL license. It forms the basis for IP telephony (VOIP) or video conferencing systems.
It is compatible with almost all other H.323 capable devices.

There is a detailed manual and new users should read the tutorial.

The source code is freely available, but you can also buy a pre-configured VM with a web interface.

Features

• runs on Linux, Windows, MacOS X, Solaris, FreeBSD, OpenBSD and NetBSD
• can run as a Windows service
• accounting and call authorization via SQL database, Radius, file or external application
• database drivers for ODBC, MySQL, MariaDB, PostgreSQL, SQLite, Oracle (thanks GB Shop) and Firebird
• flexible call routing
• number rewriting (calling and called)
• support for NAT traversal (H.460.17, H.460.18, H.460.19, H.460.23 and H.460.24)
• full H.323 proxy
• IPv6 support (incl. IPv4-IPv6 conversion)
• TCP interface for applications
• CTI functions (eg. VOIP call-center, call transfers)
• gatekeeper clustering support (neighbors, parent/child, alternates)
• H.235 security (password authentication and H.235.6 media encryption)
• LDAP / ActiveDirectory support (H.350 or free form schema)
• graphical user interface
• list of supported standards
• it's free, including source code

Support

Please subscribe to the mailinglist to stay up-to-date, discuss the GNU Gatekeeper or ask questions. Also follow us on Twitter and subscribe to our blog to stay up to date.

Web Interface

The web interface is a commercial add-on to the GNU Gatekeeper. You can order it here.