whitelist+

Mod Description
Whitelist+ is a simple and effective solution for servers where the default Minecraft whitelist does not work. This mod creates a fully functional custom whitelist system that can be easily managed.

To activate it, go to your world folder and navigate to:
world > serverconfig > whitelist

There you can configure the new whitelist file to control who can join your server.

Perfect for offline-mode servers or situations where the vanilla whitelist is unreliable, ensuring that only approved players can access your world.