GNU Gatekeeper (GnuGk) is a server application for managing H.323-based voice and video communication networks. It acts as a gatekeeper for H.323 endpoints, handling registration, address translation, admission control and call routing.
H.323 is a collection of protocols used in IP telephony and videoconferencing. Although SIP dominates many contemporary deployments, H.323 remains important in established telecommunications systems and specialist conferencing infrastructure. GNU Gatekeeper provides the signalling and management facilities required to connect compatible devices and gateways.
The software is designed for demanding network environments, including installations where endpoints sit behind firewalls or network address translation devices. It offers flexible routing policies and can be integrated with existing authentication, accounting and directory services.
GNU Gatekeeper can also operate in routed and proxy modes, allowing administrators to control how signalling and media traffic pass between network segments.
This is free and open source software.
Key Features
- H.323 endpoint registration, address translation and admission control.
- Flexible call routing with support for number rewriting and gateway selection.
- Full H.323 proxy capabilities for controlling communication between endpoints.
- NAT traversal using H.460 extensions, including H.460.18 and H.460.19.
- Authentication, authorisation and accounting using SQL databases, RADIUS and external applications.
- Database connectivity including MySQL, MariaDB, PostgreSQL, SQLite, Oracle and ODBC.
- H.235 authentication and supported media encryption mechanisms.
- Gatekeeper clustering using neighbours, parent/child relationships and alternate gatekeepers.
- IPv6 support, including communication between IPv4 and IPv6 networks.
- LDAP and Active Directory integration for user and endpoint information.
- Status and monitoring interface for inspecting registrations, active calls and gatekeeper operation.
- TCP control interface for external applications and call-control integration.
- Optional graphical and web-based management tools.
Website: www.gnugk.org
Support:
Developer: Jan Willamowius, Chih-Wei Huang and contributors
License: GNU General Public License v2.0
GnuGk is written in C++. Learn C++ with our recommended free books and free tutorials.
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