The GNU Gatekeeper (GnuGk) is a full featured H.323 gatekeeper under GPL license. It supports VoIP and videoconferencing and includes Radius and database support and many call routing functions.
- NAT traversal (H.460.17, H.460.18, H.460.19, H.460.23, H.460.24)
- accounting and call authorization
- flexible call routing
- external API
- gatekeeper clustering support (neighbors, parent/child, alternates)
- H.235 security
- IPv6 support
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Works well for me!
very good project