Plex Media Server returns “Not Authorized”

In light of that, I think you’ll have to revise the connection settings back to “public”. Then grant Plex server permission to get contacted from the outside on port 32400, in the Windows firewall settings. ( only this one port!) Google says this: https://www.google.com/search?q=allow+plex+server+through+the+windows+firewall Staying at “private” would be a higher risk of getting attacked from the outside, because the Windows firewall is much less restrictive when in “private” mode.