gdmitry

Hi all! There are 2 PCs. One has IP 10.72.50.235 (VoIP phone) and another is behind the router with NAT. The WAN port of router is 10.72.52.247, IP of second PC - 192.168.0.4. See below: My Network settings in ET: Ports 5060-5070 on router are forwarded to ports 5060-5070 on PC. Case 1. When I call from PC to VoIP phone everything works fine. In Wireshark I can see that in Session Description (field Connection Information) IP 10.72.52.247. Here is the packet's dump: Case 2. When I call from VoIP phone to PC it doesn't work because Express Talk sends "IP 192.168.0.4" in Session Description (field Connection Information) in packet "Status-Line: SIP/2.0 200 OK". But in field "Owner/Creator" it sends 10.72.52.247. In this case VoIP phone tries to send ACK to IP 192.168.0.4. Of course PC doesn't receive this packet (and RTP!). Here is the packet's dump: Is it correct? Thanks in advance!