[Asterisk-Users] Creating a SIP gateway for use behind NAT

[Leif Madsen]

OK.. lets just simplify this a bit.

<remote> <--TDM400P--> <*> <--IAX--> <*> <--SIP--> <remote>

I want to make a call from the very left asterisk box, through the right 
asterisk box to the remote end.  So I have a phone plugged into the left 
* box, which is connected via an IAX connection to the right * box, 
which then places the call for me over SIP.  I figure this should allow 
me to traverse NAT if the right * box is also on the GW machine (which I 
know works with SIP as it's just a firewall issue, and not NAT, which is 
simple).

So, if someone can help explain how I can make a call from the left * 
box, through the right * box to the remote SIP connection, I'd be very 
grateful!  I also promise to document anything and post it to the list 
for archival purposes, and on a website for an online reference.

Thanks in advance,
Leif Madsen.