Hi,

you can bridge IPv4 and IPv6 with Kamailio and rtpengine. Have a look e.g. to this (older) tutorial to get some ideas:

http://kb.asipto.com/kamailio:kamailio-mixed-ipv4-ipv6

Cheers,

Henning

-- Henning Westerholt – https://skalatan.de/blog/ Kamailio services – https://gilawa.comhttps://gilawa.com/

From: sr-users sr-users-bounces@lists.kamailio.org On Behalf Of Abdoul Osséni Sent: Friday, May 15, 2020 8:33 AM To: Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org Subject: [SR-Users] IPV6 header in IPV4 : ACK for 200 OK never received

Hello,

I encounter unexpected behavior.

The call flow is: UAC --> Kamailio + Rtpengine (full ipv4) --> Asterisk (full IPV4).

I configured the uac to use IPV4 but the SIP INVITES include IPV6 in headers and sdp messages. I think this is a bug on the UAC side.

Example:

1. UAC INVITE

INVITE sip:xxx@sip.xxx.commailto:sip%3Axxx@sip.xxx.com SIP/2.0 Via: SIP/2.0/TLS [2a04:cec0:101a:ebe2:9949:d81c:23a6:ae10]:42580;branch=z9hG4bK.I8U1RQDbW;rport ..... ..... v=0 o=59130c8f7268a_2 2922 1557 IN IP6 2a04:cec0:101a:ebe2:9949:d81c:23a6:ae10 s=Talk c=IN IP6 2a04:cec0:101a:ebe2:9949:d81c:23a6:ae10

2. We sent 200 OK response like :

Via: SIP/2.0/TLS [2a04:cec0:101a:ebe2:9949:d81c:23a6:ae10]:42580;received=80.214.78.1;branch=z9hG4bK.I8U1RQDbW;rport=1364 v=0 o=x 887503534 887503534 IN IP4 51.159.2.164 s=x c=IN IP4 51.159.2.164

3. We never receive the ACK message.

Is there a Kamailio or Rtpengine solution to solve the problem?

Any help will be very appreciate.

Abdoul OSSENI https://www.africallshop.com/