rmacy · August 29, 2015 14:12 · Jul 27, 2012
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+### STUN implementations
+
+* [stund](http://sourceforge.net/projects/stun)
+ * Content: server daemon and test client for STUN, **RFC-3489 only**
+ * [URL](http://www.vovida.org/applications/downloads/stun) does not load, the project **seems abandoned**
+ * The code is also available on [SourceForge](http://sourceforge.net/projects/stun), last update was on January 2012
+ * **TCP and TLS modes not supported**
+ * The server [needs two IPs](http://stackoverflow.com/a/7650970), it’s mandatory and can not be configured
+ * C++, no extra libraries required, Windows port available
+ * Version = 0.97 (0.96 package available on Debian, 5 years without updates)
+
+* [stunserver](http://www.stunprotocol.org) aka stuntman
+ * Content: high performance STUN server, a client application and code libraries
+ * **RFC-5389 + backwards compatibility with RFC-3489**
+ * UDP and TCP modes with either IPv4 or IPv6
+ * STUN code library and client application implement all NAT detection tests specified in RFC-5780
+ * "Basic" and "Full" modes to facilitate NAT + firewall behavior detection (with 1 or 2 IPs/ports)
+ * Available on [GitHub](https://github.com/jselbie/stunserver), last commit 2 months ago
+ * C++ and boost library (libboost-dev package available on Debian)
+ * License: Apache 2.0
+ * Version = 1.1.3
+ * **TLS mode + multi-core support in the roadmap, not implemented**
+ * Example C++ code available to implement your own authentication system
+ * --maxconn feature
+
+### STUN + TURN implementations
+
+* [restund] (http://www.creytiv.com/restund.html)
+ * Content: **modular** STUN + TURN server (in the same daemon), designed around the principle of a lightweight core and plugins that extend its functionality
+ * RFC-compliancy: **RFC-5389** (STUN), RFC-5766 (TURN), RFC-5780 and RFC-6156
+ * **UDP, TCP and TLS support, IPv4 and IPv6**
+ * C89 and C99 source code and [re](http://www.creytiv.com/re.html) library is needed (real-time communications with async IO support and a complete SIP stack)
+ * Version = 0.4.1 (last update: 21-Apr-2012)
+ * **User Authentication through MySQL**: in order to provide user auth and relay traffic the server needs to access a database backend, storing a copy of the entire user database in a local hash table (this might be a problem)
+ * Statistics about received STUN messages
+ * "Basic" and "Full" modes (1 or 2 IPs for NAT type discovery)
+ * Max connections for TURN service + max lifetime
+ * BINDING requests support
+ * **Status Interface module that provides server status through HTTP**
+
+* [TurnServer](http://turnserver.sourceforge.net)
+ * The project aims to be compliant with the TURN and STUN standards (respectively, **RFC-5766** and **RFC-5389**)
+ * TURN-IPv6 support (RFC-6156)
+ * **RFC-6062 support aka TURN-TCP (relay data with TCP)**
+ * **TLS support**
+ * License: GPLv3
+ * Current stable version = 0.6 (released on 2012-02-24)
+ * DTLS (Datagram TLS) support, experimental feature not defined in TURN standard
+ * Max TURN relay connections per user and max connection lifetime
+ * **Limit user bandwidth + quota support (in KBytes/s)**
+ * ACLs to deny relaying
+ * Run as unprivileged user on Linux
+
+* [ReTurn](http://www.resiprocate.org/ReTurn_Overview)
+ * STUN/TURN server and client library (RFC-5389 and RFC-5766)
+ * Support for UDP, TCP and TLS protocols, both IPv4 and IPv6
+ * Synchronous and asynchrounous client APIs provided
+ * RFC-3489 backwards compatibility support
+ * Channel Binding
+ * **Hardcoded Settings = changed by modifying the code in ReTurnConfig.cxx and recompiling**