[Freeswitch-users] FS as registra server behind SBC

Dear All, I found problem when setup FS behind Huwei SBC. my network diagram is. NAT Public IP NAT 10.x.x.x [SIP Client 1] ----- [ADSL Router] ---------------------------- SBC ---------------------------- FS / [SIP Client 2] ----- [ADSL Router] --------------------------/ It's work fine when call incomming and play sound. But i got 403 from SBC when i try to call Local extension or originate call to registerd user. I thing nat problem can someone show me sip profile config work in this case. BG Dome C.