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

[Tim Panton]

If you are careful, you only need to setup a port forward at one end  
of the IAX trunk.

Have one Asterisk register (regularly) with the other.
The second asterisk (server) will need to have port 4569 forwarded  
through it's router.
The first asterisk (client) wont need any port forwarding.

Tim.
On 2 Jan 2008, at 10:18, Rob Hillis wrote:

> 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
>>
>>
>>        
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