WebEx and Smoothwall

[Rob_D]

I'm having some trouble trying to get the Cisco WebEx softphone working.

All the firewall and filtering rules are set up on our Smoothwall as per this article: https://help.webex.com/en-us/article/WBX000028782/Network-Requirements-for-Webex-Services and it mostly works (it's connected to our system enough that I can see my call logs), but can't "sign in to the phone services".

Before I call the phone company's support, does anyone know of anything obvious I might be missing?

 

Thanks, all!