Authentication failed when connecting to 3CX phone system

[vholti]

I installed 3CX Phone System 11.0 on Windows Server 2012. The server is a dedicated server with 1 public IP.
I opened some required ports on firewall and got pass for all firewall check: 5060 (TCP and UDP), 5080 (TCP and UDP), 5090 (TCP and UDP), 9000-9049 (UDP).
I configured 3CX Tunnel configuration on server (password and Local IP I filled with my public IP). I also set the static Public IP Address on network settings.
I created a new extension on server with this configuration:
- Extension Number: 101
- First name: Test1
- ID: 101
- Password: a1234

I tried to register a 3CX Phone to that server with following configuration:
- Caller ID: 101
- Extension: 101
- ID: 101
- Password: a1234
- I'm out of the office - external IP: <server's public IP>
- User 3CX Tunnel (with server's public IP and tunnel password and port)
- I disabled firewall on my laptop

The 3CXPhone failed to register to the server.
I enabled debug mode and watched the registration process:

Tunnel has been disconnected by remote end
Tunnel is attempting to connect remote tunnel 123456 [server_public_ip]
Tunnel connection established
Tunnel send from phone to PBX: REGISTER
Tunnel received from PBX status 407
Tunnel send from phone to PBX: REGISTER
Tunnel received from PBX status 403
Not connected: Authentication failed
Phone has been disconnected - error: 403
Phone is no longer connected

Is there anybody can suggest me how to solve this authentication issue?

Thanks.
Jeff

 

[eagle2]

Re: Authentication failed when connecting to 3CX phone syste

You must specify the internal IP address for the 3CX tunnel, not the public IP.
Also you must forward port 5090 (tcp & udp) in your router to internal IP address of the 3CX server.

Regards