Kearn
Create your game server with 

Kearn makes cheat clients useless! Must be installed on both the client and the server.
Kearn is a tool for Server Operators and Modpack Creators that will enforce any changes users make to the modpack. The mod will compare the mods to the servers, users who have a mismatched game will be kicked. The integrity of the mods is checked with a MD5 Hash.
Potential Use Cases: Competitive SMP, or PVP server, or as a general anticheat.
How to Setup (1.21.8+)
-Server Operators, paste all of the client mods from the modpack into this folder on the server, 'kearn-client-mod-list'
-The folder will be generated in the clients game folders, but is not used.

-Mod Version 1.0.0 uses the Server's 'Mods' folder.

