[asterisk-users] externip nat audio sip trunk issue problem

Fri Feb 3 01:42:16 CST 2012

On 02/01/2012 06:14 PM, Gabriel Ortiz Lour wrote:
> when I configure externip/localnet correctly my SIP trunk simply
> disappear! Checking the signalling with tcpdump shows me that Im sending
> the packets to the correct SIP trunk IP but there is no response AT ALL
> from it...

Use tcpdump -v (or wireshark) to look at the SIP packet contents as well 
as the IP headers.  If possible, do this on the external interface of 
your firewall to see what's getting sent out to your peer.  See if the 
values all appear to be sane.

Compare the SIP session contents of packets with externip configured and 
packets without that setting.