I'd be interested in your results. I developed and continue to operate a free secure SIP service at <a href="https://ostel.co">https://ostel.co</a> but I chose to forego TURN in favor of using an RTP proxy to do NAT traversal. I've been investigating more options for NAT traversal at dialog endpoints but haven't implemented anything yet. <div><br></div><div>-Lee<br><br>On Monday, October 26, 2015, Simon Josefsson <<a href="mailto:simon@josefsson.org">simon@josefsson.org</a>> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi.  I'm trying to understand what free software STUN/TURN<br>
implementations exist, and how they compare.  Is anyone aware of more<br>
projects in this area?  Any corrections to the list below?<br>
<br>
reSIProcate ReTurn<br>
<a href="https://www.resiprocate.org/ReTurn_Overview" target="_blank">https://www.resiprocate.org/ReTurn_Overview</a><br>
BSD-3-clause<br>
STUN, TURN<br>
C++, BOOST, OpenSSL<br>
<br>
restund<br>
<a href="http://www.creytiv.com/restund.html" target="_blank">http://www.creytiv.com/restund.html</a><br>
BSD-3-clause<br>
STUN and TURN<br>
C, OpenSSL<br>
<br>
rfc5766-turn-server<br>
<a href="https://code.google.com/p/rfc5766-turn-server/" target="_blank">https://code.google.com/p/rfc5766-turn-server/</a><br>
<a href="https://code.google.com/p/rfc5766-turn-server/" target="_blank">https://code.google.com/p/rfc5766-turn-server/</a><br>
BSD-3-clause<br>
STUN, TURN<br>
C, OpenSSL<br>
Deprecated - see coturn<br>
<br>
coturn<br>
<a href="https://github.com/coturn/coturnn" target="_blank">https://github.com/coturn/coturnn</a><br>
BSD-3-clause<br>
STUN, TURN<br>
C, OpenSSL<br>
<br>
TurnServer<br>
<a href="http://turnserver.sourceforge.net/" target="_blank">http://turnserver.sourceforge.net/</a><br>
GPLv3+<br>
STUN, TURN<br>
C, OpenSSL<br>
Dead?<br>
<br>
Stuntman<br>
<a href="http://www.stunprotocol.org/" target="_blank">http://www.stunprotocol.org/</a><br>
Apache2<br>
STUN only<br>
C++, BOOST, OpenSSL<br>
Dead?<br>
<br>
PJSIP<br>
<a href="http://www.pjsip.org/" target="_blank">http://www.pjsip.org/</a><br>
GPLv2+|proprietary<br>
STUN, TURN<br>
C, OpenSSL<br>
Really FOSS? External contributions?<br>
<br>
OfficeSIP TURN Server<br>
<a href="https://sourceforge.net/projects/turnservernet/" target="_blank">https://sourceforge.net/projects/turnservernet/</a><br>
GPLv2+<br>
STUN, TURN<br>
C#<br>
Dead?<br>
<br>
STUN Client and Server<br>
<a href="https://sourceforge.net/projects/stun/" target="_blank">https://sourceforge.net/projects/stun/</a><br>
Vovida Software License<br>
STUN<br>
C++<br>
Dead?<br>
<br>
ice4j<br>
<a href="https://github.com/jitsi/ice4j" target="_blank">https://github.com/jitsi/ice4j</a><br>
Apache2<br>
STUN, TURN<br>
Java<br>
Server?<br>
<br>
Thanks,<br>
/Simon<br>
</blockquote></div>