El Thursday 12 June 2008 08:59:55 Pezhman Lali escribió: > Dear, > I find that stun and symmetric nat can not work together , > but some big sip providers like sipgate or fwd, added stun settings to > their ata as default without, any question about customer's nat type. > > where is the key ?
AFAIK a device doing STUN test discovers the type of its NAT and returns a value to the application invoking it (the ATA). If the ATA receives "Symmetric NAT" when doing he STUN test it cannot set public IP:port in the SIP messages since the ANT type will make them not working. So, it's a device decission wherever to use STUN or not depending on the STUN test result. For example Twinkle or Ekiga refuse to set the public IP:port discovered via STUN test if the result of the test is "Symmetric NAT". So if a device (an ATA for example) does STUN test and receives "Symmetric NAT" it shouldn't apply STUN to send requests. -- Iñaki Baz Castillo [EMAIL PROTECTED] _______________________________________________ Users mailing list [email protected] http://lists.openser.org/cgi-bin/mailman/listinfo/users
