Version Blocker

Version Blocker – Keep Your Server Safe from Wrong Game Versions

Description:

• Version Blocker is a Velocity proxy plugin that ensures only players with the allowed Minecraft version can connect to your servers. It checks each player's game version and:
• Blocks unsupported versions from accessing your Paper servers.
• Displays a custom message when a player’s version is incorrect.
• Ensures a smooth experience by preventing incompatible clients from joining.

Key Features:

• Enforce a single allowed game version.
• Customizable rejection message.
• Simple configuration and setup.

List of MC protocol : https://minecraft.wiki/w/Minecraft_Wiki:Projects/wiki.vg_merge/Protocol_History

This is a very lightweight and simplistic plugin. No support or feature requests are available.