Are other servers working? If they do, the problem is on our side and we have to wait the attack ends, so cant do anything sorry!
If you try to connect to the RUS servers, the problem is very common but we cant improve the situation sadly
No answer from the server: The servers are getting ddosed, no we can't help, no we don't know when it ends, no you can't do anything. Yes your friends can play because some hosters are blocking certain connections so you are one of the unlucky people. You can only wait.