Failed to log in: The authentication servers are currently not reachable. Please try again

Hi. I haven't been playing for a few months and today I decided to play again, however I cant get in in any multiplayer server or even Realms! Its shows the error Failed to log in: The authentication servers are currently not reachable. Please try again. I know there's already a tread with this topic but I've tried everything you guys told there and my game still doesn't allow me to enter server and realms. I'm getting a little frustrated since I've got Minecraft owned for years and now I cant play it! I've tried cleaning the notepad document, etc etc and nothing works for me. Can you guys help me!?