> 1. If UA's source IP NOT equal to Contact Header field's IP or UA's > SIP request SDP's Connection IP, then the phone is behind the NAT.
Unfortunately that's not actually accurate. Believe it or not there are many situations (e.g. pingtel) where the Contact *is* different from the source and if you try to respond to the source, your packets will be dropped on the floor. This is a design flaw in SIP, so strictly speaking NAT functionality is incompatible with strict RFC2833 interpretation. Mark _______________________________________________ Asterisk-Dev mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-dev
