Today I launched my minecraft server and promoted it on some websites. Few players joined and started playing. Suddenly someone joins, says 'Goodbye' and the server is gone. I restart the server, reconnect, and it's down again. And so on…
It's not a cracked server. We're playing with premium accounts.
Is there a way to stop this (plugins/configs/dns/…) and/or get the player who did this banned?