Creative Cloud Packager unable to connect

Hi,

I am attempting to install several Adobe Applications via Packager.

After installing Packager, I was not able to login to the Adobe account, and it shows an error message as attached below.

With prior understanding that, the network used to access to the Internet is behind a Proxy Server.

I suspect that the proxy is the main issue, as mobile hot-spots are tried to connect and it is working completely fine.

But it will not be very logical to download the applications through mobile hot-spots as the data usage fees are too expensive.

Will anyone be able to advise me what are the ports that should be opened to allow full access to the Adobe Servers? I plan to inform the Proxy admins with the information.