OreHider
This mod provides protection against X-ray cheats on the server side by replacing all ores in chunk data packets sent to the client with regular stone. As a result, players cannot see ores on the client side, preventing their detection through dishonest methods.
No client-side installation is required - all functionality works exclusively on the server.
When a player approaches an ore block within a certain distance, the server automatically shows them the actual block. The minimum detection distance and check frequency can be configured by the administrator.
The system is fully customizable: you can specify which blocks should be hidden and what they should be replaced with. This uses mod identifiers, block names in the registry, and metadata. The use of the * symbol as a template for metadata when specifying target blocks is also supported.