Dear all, We have deployed a Sipxecs 4.4 server (latest fixes) and are experiencing problems with NAT traversal.
Our server has a public IP address. We have a SIP trunk configured to an ITSP. We are using a combination of remote Sip phones both on NAT and without NAT. For supporting the NAT users, the NAT traversal option has been enabled. The problem is that using this configuration the non-NAT phones work OK, but the NAT phones do not setup an RTP connection correctly (no sound both ways). After we enable the 'server behind NAT' checkbox both NAT and non-NAT are able to connect successfully. But with the 'server behind NAT' checkbox enabled the non-NAT phones will lose RTP connection after about 5 minutes on inbound phone calls (session will stay, but sound drops). Outbound phone calls have no problem. The NAT phones though work perfectly (both inbound and outbound) with the 'server behind NAT' setting enabled. What are we doing wrong? What does the 'server behind NAT' checkbox exactly do, related to NAT traversal? Why do we have to enable it to get our NAT phones working while our server has a public IP? Help is appreciated very much. Thanks, GJ _______________________________________________ sipx-users mailing list [email protected] List Archive: http://list.sipfoundry.org/archive/sipx-users/
