Kamailio with 2 daisy-chained rtpengine

Hi,

I have an IMS setup with Kamailio, where the attached phone is in private
network. 2 rtpengines are required to bridge between networks:
1. with 2 network interfaces - internal and external
2. with single interface in the external network (required as this
interface is known to a firewall, not under my control)

I'm trying to daisy-chain the 2 rtpengine instances so media path could be
established, by following the documentation:

modparam("rtpengine", "rtpengine_sock",
"1 == udp:X.X.X.X:9910")
modparam("rtpengine", "rtpengine_sock",
"2 == udp:Y.Y.Y.Y:9910")

after that in the script on INVITE:
set_rtpengine_set("1", "2");
rtpengine_manage("internal, external");

and on the answer:
set_rtpengine_set("1", "2");
rtpengine_manage("external, internal");


The behaviour I was expecting was in the offer to see only the IP of
rtpengine of setid 2 and on the answer to see the internal address of the
rtpengine of setid 1. What I'm actually observing is both addresses of the
2 rtpengines get appended on both directions and this seems to confuse the
phone as no RTP is flowing.

I'll appreciate any help, suggestions or guidance.

Regards,
Lyubomir Yatanski

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