Authentication server down error


New user
Hello all, i am getting the "authentication servers are down" error message logging into my personal server, the service websites say authentication is up, and my client shows me as online and authenticated.

in the event that it is an issue with the server what are some areas i can look at as a potential issue?

Needed info:
FTB Beyond modpack - 1.10.2 minecraft
Server Hardware - dell z400 workstation rebuild
Windows server 2012

i have checked all firewalls on all of my machines, they all have Javaw as an outgoing and incoming exception.
the port being used for the server connection is properly forwarded, though not needed since it is an in-home server

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