[Serusers] small static forward problem and general question

First of all let me start by saying thank you to the people that helped me so far. I have a question: I want to build this type of system: _____ | | 192.X.X.X<---->| | | SER |<-------> WAN 190.X.X.X<---->| | |_____| (as u can c my drawing skills aint that good) I'm currently running SER on the local 192.X with only one small problem. My question is I know I'll have to run an RTP proxy and some sort of NAT/STUN. I just don't know what exactly to use. To my problem: This is a snippet of the code: if (uri=~"^sip:9") { strip(1); record_route(); forward(192.X.X.X, 5060); }; This is a simple static route to PSTN GW. The invite gets to the GW. The "BYE" from the GW gets to the SER machine but the SER doesn't send it to the client that established the call (it just doesn't to a thing) Shi Hoch