Re: [asterisk-users] Two Asterisks behind NAT and need to link them using IAX trunk

The reason that IAX2 is considered good for NAT issues is that it uses only one port for both control messages and voice traffic as opposed to SIP that uses a predictable port for control messages and an unpredictable one for voice/video traffic.

If both servers are behind NAT servers, you will need to ensure that the appropriate UDP port (by default 4569) are forwarded to your Asterisk servers.  Only this port is required - RTP isn't used by IAX2.

bilal ghayyad wrote:

Hi List;  I heared that IAX is good for NATing issues, but I do not know if it can help me in that senario:  I have two Asterisks machines in different sites and both are behind NAT (both have private IP address), I need to link these two asterisks with IAX trunk (if it help really in such senario), but I do not know if it will work without doing special routing settings on the router (like TCP/UDP port mapping or IP forwarding)? How that will be it if possible? Or I have to do a kind of port mapping?  If I will need to use port mapping, then I have to map the TCP and UDP ports that are determined in iax.conf and rtp.conf files at site A for asterisk ip address at site A? Or I have to map the TCP and UDP ports that are in iax.conf and rtp.conf at site B for asterisk ip address at site A? In other words, if I am at site B then I have to go for router B and do mapping for TCP/UDP ports of the asterisk at site B or the asterisk at site A?  Any help. Regards Bilal         ____________________________________________________________________________________ Looking for last minute shopping deals?   Find them fast with Yahoo! Search.  http://tools.search.yahoo.com/newsearch/category.php?category=shopping  _______________________________________________ --Bandwidth and Colocation Provided by http://www.api-digital.com--  asterisk-users mailing list To UNSUBSCRIBE or update options visit:    http://lists.digium.com/mailman/listinfo/asterisk-users