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 >
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