[asterisk-users] Dead Air on PF firewall

[Horwich IT Services (Godwin Stewart)]

On Mon, 10 Mar 2008 07:00:17 +0800, NOC ph <nocph at aol.com> wrote:

> I have an asterisk box on my DMZ, and I'm using a PF for my firewall, I 
> can make a call but some reasons I have a dead air.

Judging by the fact that you're portforwarding port 5060, I'm guessing that
you're using SIP with the outside. This also means that you need to allow
the RTP stream though your NAT FW. Port 5060 only carries the signalling,
the audio is carried by the RTP stream, which is why you're getting no
audio.

Google will probably let you know which UDP ports your appliances are using
for the RTP stream. General help that you'll be able to refine WRT the
specifics of your setup is available here:

http://www.google.com/search?q=asterisk+%22no+audio%22

-- 
Godwin Stewart - Horwich IT services