[asterisk-users] Differences between Chan_SIP and PJSIP with NAT and STUN

[Joshua Colp]

Chirag Desai wrote:
> So I see:
>
> EXTERNAL_SNOM_IP -> EXTERNAL_ASTERISK_IP   (UDP,  length 218, src:
> 60798, dst 11128)
>
> EXTERNAL_ASTERISK_IP -> INTERNAL_SNOM_IP   (UDP, length 218, src: 11128
> dst 60478
>
> So i see udp from the phone, but there's no audio.

If "rtp set debug on" shows no packets being received then they are not 
being read off the socket, so I'd check the system and make sure there 
really is no firewall like I said. Once packets start getting received 
then we'll change the target address and audio will flow.

It may even be that when using TCP or UDP you have some sort of helper 
which is opening up the right firewall ports and when TLS is in use it 
can't see the traffic and thus doesn't.

-- 
Joshua Colp
Digium, Inc. | Senior Software Developer
445 Jan Davis Drive NW - Huntsville, AL 35806 - US
Check us out at: www.digium.com & www.asterisk.org