Try to remove the public IP from your Asterisk Box, this will even provide additional security.

Then install RTPEngine, configure the RTP Engine accordingly, setup NAT to your Kamailio configuration and try.

the following URLs are very good info on how to integrate everything:

http://www.evaristesys.com/blog/server-side-nat-traversal-with-kamailio-the-definitive-guide/

https://blog.voipxswitch.com/2015/08/11/rtpengine-with-kamailio-as-load-balancer-and-ip-gateway/

Hope this helps!

Sérgio Charrua

www.voip.pt
Mobile: +351 91 631 11 44

Email : sergio.charrua@voip.pt
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On Mon, Apr 27, 2020 at 8:06 PM hugues <huguesmax@gmail.com> wrote:

Hello
I'm trying to run Kamailio in front of an asterisk server due to security
issues. Both servers have a public ip address. It works fine but the RTP
voice traffic goes directly from the VOIP client to the asterisk server
without going through the kamailio server. I want to shut down the asterisk
server so that it only talks to the kamailio server.

UA -> Kamailio public IP addr <-> Asterisk public ip addr

How do I force RTP traffic to go through kamailio. Apparently I don't have
NAT so I don't need rtpproxy. But you need something that relays RTP
traffic?
If anyone has an idea I'll take it.
Thank you for your help.
Hugues.

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