Very interesting thing going on between opensips and my client [UA] Opensips sending following contact header to Client but on client side i check it received different contact header, who is changing it?
[UA]-----[Opensips]------[FS] UA - 173.xx.xx.xx.215 Opensips - 182.xx.xx.164:5060 FS - 182.xx.xx.162:5061 My UA behind the NAT and I have ALG disabled on router. * [Opensips] sending following packet SDP OK 200 to [UA] 2015/04/08 07:42:22.820354 182.xx.xx.164:5060 -> 173.xx.xx.215:49152 SIP/2.0 200 OK Via: SIP/2.0/UDP 173.xx.xx.215:49152;received=173.xx.xx.215;rport=49152; branch=z9hG4bKPjHB6245E6-SpIsEUs.kPIxxNAFMM0HTDo Record-Route: <sip:182.xx.xx.164;lr;ftag=OdSDiepaL9YssVLqOv. 3C82QrrsrrdUV;did=3fd.556edf93> CSeq: 722 INVITE Contact: <sip:1646327x...@182.xx.xx.162:5061;transport=udp> * [UA] Received following packet, look at Contact: it changed here. 162 to 164. U 182.xx.xx.164:5060 -> 192.168.1.9:60895 IP/2.0 200 OK. Via: SIP/2.0/UDP 173.xx.xx.215:49152;received=192.168.1.9;rport=49152; branch=z9hG4bKPjHB6245E6-SpIsEUs.kPIxxNAFMM0HTDo. Record-Route: <sip:182.xx.xx.164:5060;lr;ftag=OdSDiepaL9YssVLqOv. 3C82QrrsrrdUV;did=3fd.556edf93>. CSeq: 722 INVITE. Contact: <sip:1646327x...@182.xx.xx.164:5061;transport=udp>.
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