External Extensions - 403 Authentication failed

[semtex65]

Hi All,

I have just recently got a 3CX system up and running, with Cisco7940's on the LAN (working fine), and would like to use a combination of softphones and snom 300's for a few outside workers.

For the external softphones and Snoms I'm getting a 403 authentication failure. If i use the tunnel feature on the 3CX softphone I can establish a connection. Obviously on the Snoms there is no option to do this.

I tried disabling windows firewall (2008 R2) but still no luck.

A bit of background on the setup:

Server: Windows server 2008 R2
Ports forwarded: 5060 – (SIP) TCP/UDP
5061 – (Secondary SIP) TCP/UDP
3478 – (STUN) TCP/UDP
9000 – 9003 – UDP
5090 - TCP/UDP

If anyone can shed any light on why non-tunneled connections fail to authenticate it'd be much appreciated.

Thanks
Stu

 

[leejor]

That failure usually means that a setting in the phone does not match the settings in the 3CX extension information. Double check your user names/passwords. Did you enable STUN on the remote sets? What does a registration attempt, from the 3CX log, look like?

 

[semtex65]

Thanks for the quick reply, but don't worry - I have found the issue.

Stupid me overlooked the ticked box for 'Disallow use of extension outside the LAN'

You live and learn i guess! Thanks anyway.