My server.propertis: Code: #Properties Config file #Thu Jul 23 07:17:41 MSK 2015 server-name=ServerName motd=[Team War] Closed Beta Test server-port=12026 memory-limit=2048M white-list=off announce-player-achievements=on spawn-protection=16 max-players=50 allow-flight=off spawn-animals=on spawn-mobs=on gamemode=2 force-gamemode=off hardcore=off pvp=on difficulty=1 generator-settings= level-name=world level-seed= level-type=FLAT enable-query=on enable-rcon=off rcon.password=yourpassforrcon auto-save=on However, cheaters calmly fly and doesn't kick. core bug?