[Asterisk-Users] NAT/SIP solution?

[Leif Madsen]

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)