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coturn: Open Source STUN/TURN Server for NAT Traversal (WebRTC, VoIP, Gaming)
coturn is a free open source implementation of TURN and STUN servers. It is used to traverse NAT and firewalls for real-time communication applications such as WebRTC, VoIP, and online gaming.
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Added on 2025年6月19日12,522
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LanguageProject Introduction
Summary
coturn is a robust, open-source server implementation designed to facilitate NAT traversal for peer-to-peer multimedia streams. It provides standard-compliant STUN and TURN services essential for modern real-time communication applications like WebRTC.
Problem Solved
Modern network architectures frequently use NAT and firewalls which can prevent direct peer-to-peer connections needed for real-time communication. coturn provides a reliable way for clients to discover their public IP (STUN) or relay media through the server (TURN) when direct connections fail.
Core Features
Full STUN/TURN Protocol Support
Implements RFCs for STUN (RFC 5389) and TURN (RFC 5766), including various extensions over UDP, TCP, TLS, and DTLS.
Flexible Authentication Methods
Supports multiple authentication mechanisms, including static long-term credentials, RFC 5766 compliant authentication, and external authentication interfaces.
High Performance and Scalability
Designed for high performance and scalability, capable of handling thousands of concurrent connections and high traffic loads.
Tech Stack
C
C++
使用场景
coturn is essential for any real-time communication scenario where participants may be located behind Network Address Translation (NAT) or firewalls, preventing direct peer-to-peer connections.
场景一：WebRTC Applications (Video Conferencing, Chat)
Details
Enables peer-to-peer audio, video, and data channels in WebRTC applications by handling NAT traversal through STUN and relaying media via TURN when necessary.
User Value
Ensures successful and reliable communication sessions for users regardless of their network environment.
场景二：VoIP Systems and IP Telephony
Details
Facilitates voice and video calls in IP telephony systems (VoIP) for users connecting from behind corporate or home NATs to a PBX or other endpoints.
User Value
Guarantees call connectivity and maintains media flow for dispersed users.
场景三：Online Gaming and Peer-to-Peer Connections
Details
Used in multiplayer online games to help players behind different NAT devices establish direct connections or relay game data through the TURN server.
User Value
Improves game performance by enabling P2P when possible and providing a reliable relay fallback.
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