[Serusers] Outbound Proxy

Hello All, Can anyone tell me whether the following setup can be achieved with SER? [UA] <-------> [Gateway/NAT/SER Proxy] <--------> [SER Registrar] 1. The UA is behind a NAT gateway. 2. Whenever the SER Proxy on the NAT Gateway receives a registration request from a UA ( tester@gateway )on the private network, it sends a registration request ( tester@ser-registrar ) to the "SER Registrar" on behalf of the UA. This means the SER Proxy should be able to translate a SIP URI on the public side ( tester@ser-registrar ) to one on the private side ( tester@gateway ) and forward it to the right machine. Any feedback will be greatly appreciated. Regards, Dhiraj Bhuyan Security Research Engineer BTexact Tel: +44 1473 643932 Mob: +44 7753231984 Email: dhiraj.2.bhuyan(a)bt.com