I am experiencing an error where I cannot connect an external SIP phone to a FreePBX Distro server. The attempt to connect doesn’t even reach sip debug.
The server is behind a NAT with port forwarding properly applied (5000-5082 UDP & 10000-20000 UDP port forwarded to the internal IP).
I have also enabled SIP NAT in Advanced SIP Settings and configured the NAT internal and external IP settings. I have also enabled NAT in Advanced Settings under the SIP heading.
I currently have a Cisco/Linksys router using a static IP provided by Verizon FiOS.