[SR-Users] Eternal config - Kamailio and rtpengine

Mihai Cezar cezar at mokalife.ro
Wed May 19 08:25:26 CEST 2021


Hei Rahul,

RTPengine should be on the machine with the LxC containers ?
Because on the proxy-kamailio machine i use on nic with 1 IP and a
static route that goes to the LxC VM with containers.

On Wed, May 19, 2021 at 7:22 AM Rahul mm <rahul.ultimate at gmail.com> wrote:
>
> 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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