Hi percentage-hole, hi duty-angle,
Would you share in public which URL specifically is cleared in your firewall?
Perhaps check with support and mention that the problem was solved between the 14th and 17th of July this year.
https://www.maxon.net/en/support-center
Anyway, perhaps open a ticket with your problem; when I read that many Adobe URLs are in question, perhaps your case is different.
Sorry that I do not have any better data.
Cheers