coturn is an implementation of the TURN and STUN protocols used to provide NAT traversal for WebRTC, VoIP and other real-time communication systems.
STUN helps endpoints discover how they are exposed to the public network, while TURN provides a relay when a direct peer-to-peer connection cannot be established. A TURN server is therefore an important part of reliable WebRTC deployments, particularly where clients are behind restrictive firewalls or NAT configurations.
coturn is designed for high-performance server deployments and supports multiple transports, authentication methods and network configurations.
This is free and open source software.
Key Features
- TURN and STUN server implementation.
- UDP, TCP, TLS and DTLS transports.
- IPv4 and IPv6 support.
- Long-term credential authentication.
- TURN REST API authentication mechanism.
- Multiple listening and relay addresses.
- Configurable relay port ranges.
- Multiple worker threads for multicore systems.
- Database-backed user and configuration storage.
- Command-line and configuration-file operation.
- Prometheus-compatible statistics can be exposed for monitoring.
Website: github.com/coturn/coturn
Support:
Developer: coturn contributors
License: BSD 3-Clause License
coturn is written in C. Learn C with our recommended free books and free tutorials.
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