3CX- Remote Phones

[CMI Phone]

Hello-

We have a self-hosted version of 3cx, recently I had to uninstall it and update it to the newest version. In that somehow the same ports as before won't allow anything to work. We have opened all the ports listed and allowed traffic to the web registering services. Every time I'm running the self-firewall check it fails to see the ports.

Open Ports
-443
-5001
-5060
-5090
-9000-10999


We are running
-UDM SE
-Ubiquiti Switch
-Onpremis Windows box with a static IP
-Yealink t33g softphones
-Android and IOS Apps.

 

[TheodorosG_3CX]

Have you checked the firewall configuration guideline as well?

 

[CMI Phone]

Have you checked the firewall configuration guideline as well?

Yes, I've gone over every port it needs to have enabled. With that, I've tried on a TP-Link Router and a Ubiquiti Router.

 

[SteveITS]

I assume you installed v18 u9? The ports did not change. Does your Windows server have a software firewall enabled? Same private IP as before?

 

[CMI Phone]

Yes, the ports are the same. We are running it on a Windows 11 box with the firewall disabled.

 

[bitn2]

Yes, the ports are the same. We are running it on a Windows 11 box with the firewall disabled.

IP the same of the windows machine?

 

[dkirk-ads]

All of the ports fail or just a few specific ones?

 

[TheodorosG_3CX]

Which ports are failing on the firewall test? Can you share a screenshot of the result?

 

[Marconi]

Did you put in a firewall rule that only allows traffic from specific IPs on port 5060 (or on any of the other required ports)? If you did, you will need to disable the rule(s) before running the 3CX firewall rule checker as such a filter will cause the check to fail (I learned this one the hard way and have the grey hair to prove it).