[Asterisk-Users] iax2 on a server behind a linux based stateful firewall

[Rich Adamson]

> I've got an * sitting behind a linux iptables firewall.  I have an 
> account with teliax.  After entering the registration information 
> accurately and restarting *, iax2 show registry shows a registered 
> status on that connection.
> 
> However, whenever I try to place a call, I get a "No one is available to 
> answer at this time (1:0/0/0)" status returned from the dial attempt. 
> 
> When the same account is used on the firewall ( which I installed * to 
> test this ), it works just fine.
> 
> `tcpdump -i eth1 host voip-co2.teliax.com` on the trouble box shows 
> packets coming and going to teliax without a problem.  So I'm sort of at 
> a dead end on how to figure this out.  Everything looks like it's 
> registered, and packets are flowing to the box and the box is able to 
> get out ok.  But for whatever reason, my calls aren't being completed.
> 
> Can anybody give me another idea of where to look for the problem?

Do an 'iax2 debug' while placing a call and analyze the output. Paste
it into a posting here if needed.