Is your firewall blocking it?
I don't think so. I can go to any site I want (also those from ADOBE) only the product thinks there is no internet available.
It say's 'Maak verbinding met internet en probeer opnieuw' why there is no internet according to the product I don't know.
If there was no internet I couldn't open this discussion.
I just checked my firewall and 'ADOBE APPLICATION MANAGER' has admission
There is a link in this thread that may be useful: