Just happened today...can't connect to update any website.
I tried various websites, on two different hosts.
My internet connection is fine and I can connect to the host site.

I have checked all the publish settings.
All looks good. Nothing changed from yesterday.
I have tried re-entering passwords, etc.

I have reinstalled NoF.
Checked Firewall settings, and made sure NoF is in the list of allowed.
I have turned off Fireall, Antivirus and AntiMalware programs.

I am stumped.