server for ICE/STUN/TURN, NAT traversal for SIP and Jabber

 TURN server developed by the team behind Jitsi. TURN (RFC 5766)
 provides a standardised solution for VoIP applications
 to find the most efficient way to route media streams when NAT and
 firewall devices may be present.
 .
 The TurnServer project aims to be compliant with the TURN and STUN
 Request For Comments (respectively RFC 5766 and RFC 5389). It also
 support RFC 6156 namely TURN-IPV6 (relay between IPv4-IPv6, IPv6-IPv4
 and IPv6-IPv6 addresses) and RFC 6062 namely TURN-TCP (relay data with
 TCP).