[Asterisk-Users] Sipura 2000 behind NAT issue, Vonage is working

[Rich Adamson]

> >>I have installed Vovida STUN server and point Sipura to use it. But no 
> >>luck, I still can't hear the other party. I've ended up with having 
> >>Linksys to forward all ports to my Sipura (DMZ host) which works.
> >>
> >>What is interesting is that when I'm using Vonage service (Cisco ATA) it 
> >>works just fine without touching the Linksys. How come they can get 
> >>through it?
> >>
> >>Any hints?
> >>    
> >>
> >
> >Do you have the NAT Enable and NAT keepalive set to "Yes" on the Sipura?
> >  
> >
> 
> Yes, I do. I have find out that Sipura works when I set it as DMZ host 
> on the Linksys firewall. Why Vonage can work without any special settings?

I fired up a spa3000 behind a linksys wireless firewall (befw11s4 v2)
and it works just fine with nat=yes and canreinvite=no in sip.conf.
Registration functions fine, no timeouts after days of operation,
and 2-way audio functions correctly regardless of where a call
originates.

* sip debug _should_ provide the clues needed to resolve the issue.