[Kamailio-Users] Problem with sip uri in contact field

Hi, we have a problem with OpenSER not relaying ACKs. The problem arises because we have a connection to a PBX that sends SIP uri's like this; Contact: sip:192.168.1.1 So for instance when we get a SIP/2.0 200 OK (...) Contact: sip:192.168.1.1 OpenSER relays this to the client (SIP phone) which tries to respond ACK sip:192.168.1.1 SIP/2.0 (...) This causes my $ru to be sip:domain.net whereas normally it would be sip:user@domain.net. And for somereason t_relay simply fails... I've done tcpdump on the server, and what it does is try to look for NAPTR/SRV to DNS name (domain.net) which resolves to itself. Not sure why it would do that, as the PBX sends a different IP address than that of the OpenSER server. Any ideas? Anyone experienced anything similar? (Running on Ubuntu with OpenSER 1.3.0-tls) Thanks in advance, //gojensen