[SR-Users] Audio issue when using 2 port ATA

[Daniel W. Graham]

Firewall is not doing sip alg, I have compared traces and they are the same.

Daniel W. Graham
CMSInter.net<http://cmsinter.net> LLC
989.400.4230

On Jan 6, 2016, at 3:05 AM, Daniel-Constantin Mierla <miconda at gmail.com<mailto:miconda at gmail.com>> wrote:

Hello,

is the firewall doing SIP ALG?

Can you get a SIP network trace on UA? If yes, compare it with the one captured on server.

Cheers,
Daniel

On 06/01/16 01:50, Daniel W. Graham wrote:
Setup is -

2 port ATA <> FIREWALL <> KAMAILIO / RTPPROXY <> ASTERISK

If I have a single port in use behind the firewall, all NAT functions work properly and media is relayed through rtpproxy.

If I have both ports in use behind the firewall, when outbound calls from UA are placed there is two way audio on both calls. However if inbound calls are placed to UA, the first call works, second call only has outbound audio.

Different SIP URI is used for each port.

If the firewall is eliminated everything works fine.

Anyone have an idea how to troubleshoot or what could be missing? I have done packet captures on both the UA side and Kamailio side, and I see two RTP flows (rtp ports match on both sides as well) despite lack of inbound audio on the second call.

If I can post anything config wise that would help let me know.

Thanks!

-Dan




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--
Daniel-Constantin Mierla
http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
Book: SIP Routing With Kamailio - http://www.asipto.com
http://miconda.eu

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