[SR-Users] Eternal config - Kamailio and rtpengine

[Rahul mm]

Hi Mihai,

You need to provide both public and private interface in rtpengine params.
Further, you will have to provide the direction while invoking
rtpengine_manage/offer/answer.
Check the rtpengine module documentation for details.


On Wed, May 19, 2021, 3:13 AM Mihai Cezar <cezar at mokalife.ro> wrote:

> Hi!
>
> I use lxc containers with asterisk wich their are connecting to
> kamailio, so far so good they work when i put the containers with
> public ips, but when i switched to private ip I have one-way audio.
>
> I tried to with rtpengine but no luck:
>
>  rtpengine --table=42 --listen-ng=127.0.0.1:2223
> --interface=56.12.19.100 --tos=184 --pidfile=/run/rtpengine.pid
> --no-fallback --log-level=7 --log-facility=local3
>
> the setup looks like this:
> VM-KAMAILIO-(public ip 56.12.19.100 with static routes for the private
> IP) --> LxC(n) (with private class 192.168.0.n)
>
> The problem i think is when LxC asterisk is sending back the 200 OK
> from Invite it puts his private ip in the sdp filed:
>
> v=0
> o=- 2171376102 3 IN IP4 192.168.0.2
> s=Asterisk
> c=IN IP4 192.168.0.2
> t=0 0
> m=audio 11336 RTP/AVP 8 101
> a=rtpmap:8 PCMA/8000
> a=rtpmap:101 telephone-event/8000
> a=fmtp:101 0-16
> a=ptime:20
> a=maxptime:150
> a=sendrecv
>
>
> i've loaded the modules, but after this i am stuck....
> loadmodule "nathelper.so"
> loadmodule "rtpengine.so"
> modparam("nathelper", "received_avp", "$avp(RECEIVED)")
> modparam("nathelper", "nortpproxy_str", "a=sdpmangled:yes\r\n")
> modparam("nathelper", "natping_interval", 30)
> modparam("nathelper", "ping_nated_only", 1)
> modparam("nathelper", "sipping_bflag", FLB_NATSIPPING)
> modparam("nathelper", "sipping_from", "sip:pinger at proxy")
>
> # params needed for NAT traversal in other modules
> modparam("nathelper|registrar", "received_avp", "$avp(RECEIVED)")
> modparam("usrloc", "nat_bflag", FLB_NATB)
>
> modparam("rtpengine", "rtpengine_sock", "udp:localhost:2223")
> modparam("rtpengine", "rtpengine_retr", 2)
> modparam("rtpengine", "hash_table_size", 256)
> modparam("rtpengine", "hash_table_tout", 600)
>
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