asterisk users - Nov 2007 - RTP traffic not being forwarded

Hi,

I currently have an issue where asterisk is not forwarding the RTP traffic
between 2 endpoints. The SIP session gets set up correctly, and both parties get
connected. The RTP audio is being sent by both endpoints to the correct ports on
the Asterisk server as per the session description in the SIP conversation.
However, Asterisk is not forwarding either endpoint's RTP traffic to the
other.

When using 'rtp debug' on the asterisk console, it shows that it is
receiving traffic from one endpoint, but not the other. A wireshark trace
reveals it is actually receiving traffic from both ends.

It doesn't seem to be complaining or generating any errors that I can see,
any suggestions on what I can do or where to look to find out what is going on?

Thanks in advance,

Ryan

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> When using 'rtp debug' on the asterisk console, it shows that it is
> receiving traffic from one endpoint, but not the other. A wireshark trace
> reveals it is actually receiving traffic from both ends.
Sounds like a firewall issue. Wireshark shows what's "on the
wire",
i.e. before iptables. The packets are being dropped for whatever
reason and never reach the asterisk process. Check your iptables and
RTP port range, and perhaps try changing it.

Luki