Internet close

Well 4 days now when i try to log in my minecraft account its says that i dont have succest in the multiplayer and also when i try to play the big buttom down says "Play offline" and now "Play". When i try to connect into a server its says "Failed to login:The authentication are currently down for maintenance." What can i do. I want to play again in servers with my friends.
Please help me Mojang. At all the versions!