10 Jun
2008
10 Jun
'08
3:25 p.m.
El Tuesday 10 June 2008 13:59:42 Aymeric Moizard escribió:
Stun can work even behind symmetric NAT if the stun
server was
running on the same socket the SIP server is running... I hope
this feature will come soon!
Sure? AFAIK a symmetric NAT not only depends on the destination IP but also on
the port. So unless you have a STUN server listening in all the ports
available for RTP proxing you don't know if STUN will work.
Also, clients implementing STUN will refuse using STUN if they discover they
are behind symmetric NAT. The STUN server needs 2 public IP's so probably
each one will see a different public source port from the NAT router. In this
case STUN will report "Symmetric NAT" so the client will not trust it.
For example Twinkle or Ekiga don't use STUN if STUN discovers they are behind
symmetric NAT.
Mybe I'm forgotting something? :)
--
Iñaki Baz Castillo
ibc(a)in.ilimit.es