GuardCraft
Keep your base safe from griefers, explosions and nosy neighbours.
Reinforced blocks
Right-click any block with a Reinforcement to protect it. Each tier adds a new protection:
Iron: immune to explosions and pistons.
Gold: only the owner can break it.
Diamond: immune to the Wither and the Ender Dragon.
Netherite: resists lava and fire.
Hold a Reinforcement in your off-hand to reinforce blocks as you place them. Sneak + right-click removes the reinforcement.
Padlocks & keys
Put a Padlock on a door, chest, barrel or furnace and you get its key. Only someone holding that key can open it. Use a blank key on your own padlock to make a copy for a friend.
Keypads
Install a Keypad and set a 4–8 digit code. Too many wrong guesses lock the player out for a while.
Screwdriver
Removes padlocks and keypads from your own blocks.
Config
Server owners can toggle reinforcing existing blocks, let creative-mode operators bypass protections, and change the failed-attempt limit and lockout time.
Requires NeoForge for Minecraft 1.21.1. Works in singleplayer and multiplayer.
You can use the mod in your modpack and and publish it if you give credits.

