We are having our 3rd party off-site backup connection blocked as well as any traffic in Firefox. Tried pinging http: & https: domains, but those get "could not find host" if I included the http/s: in the name. ping icann.org, no problem. Ping by IP. No problem. Use anything but IE with an external IP, nothing. Not even a server not found message.
I flushed DNS but can't yet do a server restart, Turned off AV. Not excited about shutting off Windows Firewall during production hours, nor can I restart until my maintenance window late at night.
Any ideas?
VM running Win 2016 Standard, fully updated.
Using 3rd party AV & Windows Server Essentials