[Asterisk-Users] How to register a SIP phone on Asterisk behind NAT

[Jean-Michel Hiver]

Zeeshan a écrit :

>Hi everybody,
>
>One of my client's Asterisk box is behind NAT. They have only one public
>IP on which they have their router. I can access the Asterisk server
>using port forwarding (port 22) for SSH. Now this client wants to
>connect two SIP phones to this Asterisk box from two remote locations.
>How can this be done. If I forward ports, e.g. 5060-5070 to this
>Asterisk box, there is no guarantee that the SIP phones will be using
>the same ports from the remote locations, because ports get changed over
>the Internet, like for another scenario with my client on public IP,
>remote SIP ports are 17355, 61949, 61666 etc., though they are
>configured 5060 on the phones, and 5060 in sip.conf.
>
>What is the solution in this scenario of registering SIP on Asterisk
>behind NAT?
>  
>
Have an Asterisk box on a public IP and use it to glue everything together.

Cheers,
Jean-Michel.