Simple velocity proxy plugin, that allows keeping server in a mixed online mode. By default, all players are authenticated, but for players that don't own the game, they can be whitelisted by IP and will bypass Mojang authentication servers.

Usage:

• /exempt add <player> <cidr>
  • Exempts a player
• /exempt remove <player> <cidr>
  • Removes an existing exemption
• /exempt removeall <player>
  • Removes all exemptions on a player. You'll also need to migrate their inventory from an offline UUID to an online UUID.
• /exempt list <player>
  • List all exemptions on a player
• /exempt listplayers
  • List all players that have exemptions
• /exempt reload
  • Reload config from disk