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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.<br>
<br>
If both servers are behind NAT servers, you <i>will</i> 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.<br>
<br>
bilal ghayyad wrote:
<blockquote cite="mid:994536.35143.qm@web53906.mail.re2.yahoo.com"
type="cite">
<pre wrap="">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
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</blockquote>
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