I have been having problems with a small group of Italian hackers who seem to target our server with no reason. They apparently got there hands on some sort of kickall exploit that boots all the players from a server. Here's their video: I've tried searching all over but I haven't been able to find any solution at all, so I was wondering if anyone here might have an idea on how to stop this. The best luck I've had so far was finding this older thread: https://www.spigotmc.org/threads/crash-exploit.211220/ However, there doesn't seem to be an actual solution posted there. One of the videos recommends setting tab-complete to -1 in spigot.yml, but that didn't seem to work for our server.