Authentication Servers not Reachable

When I try to connect to a server in multiplayer I get the error "Authentication Servers are not reachable. Please try again" I have tried every solution in the book, nothing, I reset my router, nothing, I used direct connection (every single server name I could think of for CubeCraft), nothing, I uninstalled and reinstalled, nothing, I resetted my launcher, nothing, I reset my computer, nothing, I refresh the server list, nothing, I turned off firewall, nothing, I doubled check to make sure everything Minecraft related is allowed to be pass-through firewall, nothing, I waited for an entire day, nothing, absolutely nothing, I really don't know what to do, my Gamertag or Username for Minecraft is Trible69, please help me.