As you may remember, we have recently banned a good bunch of hacking scum.
Instead of destroying the game by unfair ingame activities - attacking the servers from the outside has now become a new hobby for someone in that batch.
While we are still using a provisional server setup, it is unfortunately not too difficult to bring down some parts of the infrastructure.
It may take a little while until this issue gets resolved for good, but we are working on it. In the meantime, thanks for your understanding and support.