Chunck Protector

Chunck Protector is a server-side only Fabric mod that protects chunk-based territories with per-area flags. It runs entirely on the server, so players join with a vanilla client and need no mods installed. There are no dependencies besides Fabric Loader (no Fabric API required).

How it works: an administrator selects chunks with an in-game tool, creates a named protected area from the selection, and then toggles protection flags either from an in-game chest GUI or with commands. Every flag is enforced on the server the moment the matching event touches a protected chunk: block edits, PvP hits, explosions, projectiles, ender pearls, liquid flow, fire spread, flight, mob spawning, and more.

Supported versions

Download the file whose name matches your Minecraft version.

File	Minecraft	Java	Fabric Loader
chunck-protector-1.0.0+1.21.11.jar	1.21.11	21	0.19.3
chunck-protector-1.0.0+26.1.jar	26.1 - 26.1.2	25	0.19.3
chunck-protector-1.0.0+26.2.jar	26.2	25	0.19.3
chunck-protector-1.0.0+26.3.jar	26.3	25	0.19.5

Installation

1. Install Fabric Loader for your Minecraft version on the server.
2. Put the matching .jar file into the server mods folder.
3. Start the server. A default config file is created at config/chunk_protector.json.
4. Give yourself operator status. All management commands require the configured permission level (default: operator level 4).
5. Nothing needs to be installed on clients.

Commands

All commands start with /chunkprotector and require operator permission (configurable, default level 4).

Command	Description
/chunkprotector info	Show command help in chat
/chunkprotector reload	Reload the config file from disk
/chunkprotector list	List all protected areas with chunk counts
/chunkprotector check	Show whether your current chunk is protected and list its flags
/chunkprotector menu	Open the flag GUI for the area you are standing in
/chunkprotector tool stick	Give yourself the Admin Protection Tool (stick) for selecting chunks
/chunkprotector tool shovel	Give yourself the Claim Tool (netherite shovel)
/chunkprotector selection	List your currently selected chunks
/chunkprotector selection clear	Clear your current chunk selection
/chunkprotector area create <id>	Create a protected area from your selected chunks
/chunkprotector area <id> menu	Open the flag GUI for a specific area
/chunkprotector area <id> toggle <flag> <true|false>	Set one flag of an area from the command line

Area ids and flag names support tab completion.

Typical setup flow: /chunkprotector tool stick, right-click blocks to select chunks, /chunkprotector area create spawn, then /chunkprotector area spawn menu to configure flags.

Configuration

Main file: config/chunk_protector.json.

Field	Default	Description
admin_tool_item	minecraft:stick	Item handed out by the tool stick command
claim_tool_item	minecraft:netherite_shovel	Item handed out by the tool shovel command
required_permission_level	4	Operator level required to run management commands
safety_border_buffer_blocks	16	Buffer distance around protected areas used by liquid-flow protection
protected_areas	[]	Array of protected area definitions

Each entry in protected_areas has the following shape:

Field	Default	Description
area_id	(required)	Unique name of the area, used by commands and the GUI title
chunks	(required)	Array of chunk coordinates, each as {"x": <int>, "z": <int>}
auto_merge	true	Fill gaps between the listed chunks so the area behaves as one region
flags	(see below)	Per-area protection flags

Flags

Every area has its own copy of these flags. Flags can be toggled in the GUI or with /chunkprotector area <id> toggle <flag> <true|false>.

Flag	Default	Description
pvp_enabled	false	When false, player attacks on other players are cancelled in the area
block_edit_admin_only	true	When true, only operators can place or break blocks in the area
ender_pearls_allowed	false	When false, ender pearl teleports into or inside the area are blocked
tnt_explosions_allowed	false	When false, TNT explosions are suppressed in the area
liquid_flow_allowed	false	When false, lava and water cannot flow into the area
griefing_protection_active	true	Master switch for general griefing checks
projectiles_disabled	true	When true, projectiles such as arrows are stopped in the area
no_flight_zone	true	When true, flight is disabled for non-operator players in the area
no_fight_zone	true	When true, all combat and entity damage is blocked in the area
mob_spawning_allowed	false	When false, natural mob spawning is blocked in the area
wither_creeper_grief_allowed	false	When false, wither and creeper explosions do not break blocks
hostile_despawn_proximity_radius	8	Hostile mobs within this many chunks of a player are despawned; set to 0 to disable
sulfur_cube_damage_disabled	true	When true, sulfur cubes cannot explode in the area (26.2 and newer)
fire_spread_disabled	true	When true, fire cannot spread inside the area
crop_trample_disabled	true	When true, farmland and crops cannot be trampled in the area
item_drop_disabled	false	When true, non-operator players cannot drop items in the area
vehicle_entry_disabled	false	When true, players cannot enter boats, minecarts and other vehicles in the area
animal_breeding_disabled	false	When true, animal breeding is blocked in the area

Flag GUI

The /chunkprotector menu and /chunkprotector area <id> menu commands open a 54-slot chest menu. The top row shows the area name, chunk count and auto-merge state. Flags are grouped by category (Combat, Building, Movement, World, Entities) and each item shows its current ON/OFF state, what the flag does, what ON and OFF mean, and a click hint. Enabled flags glow. Left-click a flag to toggle it; the change saves immediately. Empty slots are filler panes and cannot be taken.

Notes for server owners

• The mod is server-side only. Do not put it on clients; vanilla clients work as-is.
• Reload the config with /chunkprotector reload after editing the JSON by hand.
• Overlapping chunk selections resolve through an internal cache that is rebuilt on load and reload.
• License: MIT.