Made no configuration changes to the firewall tonight. Shutdown FreePBX VM, made a new one, and stuff seems to be working as it should. I'll do a few more tests tomorrow to make sure all is well. Edit: I lied. I made a new DHCP reservation for my new FreePBX server.

@RamblingBiped said in SIP Phone registers no audio...: Here is the guide I followed to get the Yealink T23G to work with OpenVPN: http://www.sunstatetechnology.com/docs/YealinkOpenVPNGuide.pdf When I disable NAT on the extension the phone is unable to register. Something is wrong there, that sounds like the VPN is not working as there is no NAT when there is a VPN.