[Asterisk-Dev] IAX behind NAT?

Tilghman Lesher tilghman at mail.jeffandtilghman.com
Mon Mar 24 19:28:13 MST 2003

On Monday 24 March 2003 19:20, Brian Capouch wrote:
> I am running two instances of NAT, both behind firewalls.
> In one case, the private IP for the asterisk box is
> translated, 1-to-1, to a public IP.
> In the other case, the asterisk box shares and IP with other
> users.
> Here's the rub: the "shared NAT" box seems to be able to send
> traffic to the "1-to-1 NAT" box just fine, and voice goes
> nicely both ways.  In this case there is an entry in iax.conf
> that contains the visible IP of the 1-to-1 box.
> But the other way doesn't go so smoothly.  I hope I can say
> this intelligbly: if I try to have the 1-to-1 box answer an
> incoming PSTN call and then use IAX to pass it off to the
> "shared NAT" box, I see the IAX connection request going out,
> but at the other end it nothing is ever logged.
> Is this to be expected?  If not, could someone point me
> towards a method of debugging the problem?
> I'm sure it must be due to the many machines (I'm at a
> conference, and want to show off asterisk) who are all sharing
> the same IP.
> I know they have a Linksys box at the head end of the network
> here. .

I believe that you'll want to have the asterisk server behind the
shared NAT register with the server behind the 1-to-1 box.


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