[SR-Users] Kamalio + RTP Engine + SIP Client behind NAT

Richard Fuchs rfuchs at sipwise.com
Thu Jan 16 23:10:06 CET 2020

On 16/01/2020 12.29, Nuno Miguel Reis wrote:
> Hi again.
> Thanks for all the help and suggestions. I realized the issue happens 
> if using kernel forwarding only. If I change rtpengine to start at 
> userspace without the kernel module enabled everything works fine as 
> expected.
> Do you have any hints on why this could be happening with the kernel 
> module?
> I'm running rtpengine like this:
> usersapece: $ rtpengine -f -L 7 --interface= 
> --listen-ng= <> --tos=184 --sip-source
> kernel: $ rtpengine -f -L 7 --table=0 --interface= 
> --listen-ng= <> --tos=184 
> --no-fallback --sip-source
The kernel module receives its instructions from the userspace daemon, 
so there's no reason there should be a difference. Can you post 1) logs 
and 2) the flags you use for your offers/answers?


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