Why doesn't Skype download files via Squid after upgrading to version 8?

Question

Skype

Good day to all.
Tell me, there is a configured Squid3 + SquidGuard, everything worked fine before updating Skype to version 8. Files stopped downloading after update. Bypassing the proxy you start up - everything works fine. It connects through a proxy, you can communicate by text (I did not check the calls, because we do not use it). Maybe someone also encountered or tell me where to look.

Answer 1

Well, it is obvious that Squid cuts some port on which Skype files are transferred. Find out and open it.