[OpenSIPS-Users] Problem with Opensips routing Reinvite ACK

[Nauman Sulaiman]

Hi, we have a set up as follows using Opensips 1.6.2

UA  ->   OpenSIPS  -> SIP Provider

TLS        TLS           UDP
           UDP

We can set up a call from Sip Provider to UA. However when we issue a Reinvite due to (Hold) from UA the Sip provider gets the invite and sends 200K to which the UA responds with an ACK , however Opensips does not seem
to be routing this ACK back to the provider. Strangely the Reinvite which initally started this has the same route set, yet that reaches the provider.

ACK sip:anonymous at 217.10.79.23:5060 SIP/2.0
   Via: SIP/2.0/TLS 192.168.0.4;branch=z9hG4bKyQatKQmaHK0Br
 Route:
<sip:178.230.138.190:5061;transport=tls;r2=on;lr=on;ftag=as7615d7df>
   Route: <sip:178.230.138.190;r2=on;lr=on;ftag=as7615d7df>
   Route: <sip:217.10.79.23;lr=on;ftag=as7615d7df>
   Route: <sip:172.20.40.3;lr=on>
   Route: <sip:217.10.79.23;lr=on;ftag=as7615d7df>
   Max-Forwards: 70
   From: <sip:00441619082575 at sipgate.co.uk>;tag=t8B2BFQDUgNvc
   To: "anonymous" <sip:anonymous at sipgate.co.uk>;tag=as7615d7df
   Call-ID: 27a6f665224ffd7b7c5e0d2616be4dee at sipgate.co.uk
   CSeq: 2556588 ACK
   Content-Length: 0