Why does one customer get forbidden when trying to access Service desk ?

Question

I am hosting my own instance of Jira and Service Desk, running on ports 8082 (http) and 8443 (https).

The https service is using a PFX keystore file, type PKCS12 if that's relevant at all.

My problem is that, although I can access the server from outside my own network, as can most of my customers, one customer can access the http site, but whenever they try the https site they get "server refused the connection" or some such thing (they run Sophos web safety which comes up with a "Forbidden" message).

I can't see it being a firewall issue, as the firewall rules are the same for all the ports in use.

All help gratefully received :)

Nic Brough -Adaptavist- · Accepted Answer

This is pretty much the configuration of the Sophos web safety software - it's been told, on their machine, to block your https site.