I work with a vendor that publishes their application using the appeon plugin.  I have a work from home user that cannot print from the application, it gives them a 'Communications Error' popup.  I have narrowed it down to their firewall (its locked down more than most wfh users), however I have logging turned up and I see nothing being blocked (nor do I know why they would not be able to print from a web page, however I'm sure its something weird that the appeon app is doing).

Any thoughts? I cannot find an article anywhere on bizarre ports that Appeon uses...