Hello Everyone! I have an SG310 that I am about to throw out the window. It really isn't any fault of the Sophos but my stupid PBX. The issue : Calls aren't flowing correctly. The cause : RTP packets contain internal addresses The fix: Sip ALG! but sophos doesn't really have that. So to break the issue down. We have 3 pieces A Mitel 3300 Sophos SG310 (latest firmware) Intelepeer SIP Providers Mitel is crap about how it handles PBX connections, the 3300 just initiates the session then throws it to a phone which then initiates a session. This leads to NAT issues. With the help of Intelepeer (who has nat sensitive settings) I have managed to beat the heck out of the sophos rules and get inbound and outbound calls working. The problem is that calls can't transfer. For Intelepeer to deal with NAT it has to either have a IP that never changes or a Port that never changes (per call). When the mitel 3300 tries to hand off the call the SIP connection dies. So the question becomes... How the hell is something like this supposed to work.
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