i'm going crazy with an issue with WiFi VoIP users. Our VoIP server, Opensips 1.11.9, was inside DMZ with public IP address 193.x.x.110 and WiFi network is 10.x.x.x. VoIP fixed phone are inside a separated network 172.20.x.x and firewall allowed traffic in both directions between those nets.
When i call from a fixed phone (172.20.1.90, as example) to a client connected to WiFi network (ex. 10.101.8.71) it works perfectly. But, on other side, SIP signalling fail on a PRACK sent to 193.x.x.110 instead of 10.101.8.71, printing out "WARNING:rr:after_strict:no socket found for match second RR" error.
5004 was the CALLED user, 5009 the calling one, on WiFi network (10.10.1.22):