Hi all I recently set up a Centos 6.9 box to run IncrediblePBX13-12.2. For most part it is working great, except that I can't get a SIP trunk with Voip.ms to register using port 5080. The box is connected behind a router. I tried port forwarding, but that did not help so I removed it. Here is what I have tried: 1. Put Bindport=(blank) 2. Added this to PBX firewall: -A INPUT -s 220.127.116.11 -p udp -m multiport --dports 5060,5080.4569,42872 -j ACCEPT 3. Added .................................................:5080 to registration string. 4. Added port=5080 to Peer Details for that trunk. Now if I setup an ATA to connect to the same provider's IP address on port 5080 it registers and works. This is showing that the problem is coming from the PBX. Eventhough I have the PBX set up to register on 5080, when I look at the registration status in my Voip.ms account, it shows the trunk registered on port 5060. The reason I need to change the port is because I have another trunk with another provider that is using 5060 on the same PBX. Any ideas?