I'm using PAN-OS 7.1.8 on a active/passive HA cluster of PA-3050 devices for the perimeter. Just recently, people started complaining that GoToMeeting no longer works. When I investigate a test session (http://help.citrix.com/getready), the session does not start. When I look in the PAN-OS monitoring logs, I am seeing "http-proxy" being blocked. I created a temporary rule that allowed me access to that application and, after doing so, GoToMeeting worked fine.
We block and have always blocked the http-proxy application in our web filtering rules for everyone. Does anyone have any suggestions for how to get GTM working without opening up http-proxy for everyone? Is this something that should go to PAN support?