VoIP phone to outside server

[khansen]

I have 3 VoIP phones behind a PFSense firewall that connect to a remote PBX and are having trouble with lost audio / dropped calls.

Looking at the VoIP Configuration in the docs, do I need to disable source port rewriting and use the siproxd or is it one or the other? If either, which one is the better solution?

Thanks

[yaboc]

use siproxd and set outbound nat to manual