stun

• DNS SRV _stun._udp.example.com
• 参考
  • iptable matching rule for STUN/TURN traffic

port	desc
3478/udp	STUN
3478/tcp	STUN/TLS - de-multiplex
5349/tcp	TLS

Knonw STUN Server

• stun.zoiper.com
• stun.linphone.org
• 参考
  • voip-info stun

dig srv _stun._udp.stun.linphone.org

# _stun._udp.stun.linphone.org. 2527 IN SRV 0 100 3478 stun.linphone.org.

# _stun._udp.stun.linphone.org. 2527 IN SRV 10 100 3478 sip1.linphone.org.