Stig Hess wrote:
I meant where Asterisk is behing a NAT... sorry for the confusion.

Hi Stig,


If you are able to run * on your NAT'd box, then I have come up with a work around (thanks wasim!!!) that will allow you to run an * box behind your NAT, and still recieve and make SIP calls.

I haven't got the whole thing figured out yet in terms of extensions.conf (but I am working on that today, will post on my website later) but this is basically my configuration:

<remote> <--TDM400P--> <*> <--IAX--> <*> <--SIP--> <remote>
                      |-----NAT-----||FW|

So basically the * on the GW machine which is also the NAT / FW box recieves the connection from the SIP remote end, then forwards all the traffic over IAX to the NAT'd * box. I just tested it, and it works fine! Once I get some more complex extensions.conf files setup, I will post them.

Thanks,
Leif Madsen.

BTW: As for just passing SIP through SIP, I believe it's a limitation of the SIP protocol as the RTP ports are different than the connection port, whereas IAX is all the same port for everything (from what I gather)

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