by nahkoots » 18 Aug 2015, 02:37
Go to your server's console.
Click "Properties" button in the top right corner.
Click "Lava" middle button on top left.
Click "Settings II"
Scroll until you see "DisallowHacksUsOnLavaMap" and change the value to false.
Optionally, change the one below it to the value of the rank you want to be able to use hacks.