Bedrock Allow Deny Border

Bedrock Allow Deny Border brings three building-control blocks from Bedrock and Education Edition to Minecraft Java 1.21: Allow, Deny and Border.

Allow and Deny blocks rule a whole column. The nearest allow or deny block below a position decides whether blocks can be placed or broken in that column, and the highest block wins. Border blocks are invisible walls that block the entire vertical column at every Y level, so they cannot be crossed by jumping over them, flying above them, or tunnelling underneath them.

Who may pass a border block is configurable. In the default Bedrock-like mode, unprivileged players and monsters are blocked, while whitelisted or privileged players and spectators pass through, and projectiles pass as well. In the "block all entities" mode, everything is stopped except privileged players and spectators. Privileges come from a global whitelist, a per-block whitelist, or from being an operator (permission level 2, optionally requiring Creative mode).

The mod is client-side. Every player on a LAN world needs the same mod version installed, because the rules are evaluated on each client, and the host pushes configuration changes to everyone live. Mod Menu and Cloth Config are supported for a visual config screen but are optional at runtime; all settings can also be changed with the /allowdeny commands.

Requirements: Minecraft Java 1.21, Fabric Loader 0.19.4 or newer, and Fabric API. Mod Menu 11.0.x and Cloth Config 15.0.140 are optional.

Get the blocks from the "Bedrock Allow / Deny / Border" creative tab, or with /give @s bedrock_adb:allow_block.

Version scheme is {mod_version}+{mc_version}, for example 1.2.1+1.21. Licensed under MIT.

Bedrock Allow Deny Border

A faithful, client-side Fabric mod for Minecraft Java Edition 1.21 that brings the Bedrock / Education Edition Allow, Deny and Border blocks to Java Edition - designed for single-player worlds and LAN co-op world building. Every rule is evaluated consistently on all clients, and the host's configuration is synced live to everyone on the LAN.

What does it add?

Three "teacher block"-style utility blocks in a dedicated creative tab:

The blocks are extremely blast-resistant and cannot be moved by pistons, so they are safe map-making tools.

Key features

• Column-based protection - one allow/deny block governs building rules across its whole vertical column, exactly like the Bedrock original.
• Whole-column border barrier - the border wall exists from the world bottom to the world top at the block's (x, z) position; passing rules apply at every height.
• Two border modes, selectable in-game:
  • Bedrock-like (default): blocks unprivileged players and monsters; projectiles, spectators, privileged players, vex and the ender dragon may pass.
  • Block all entities: blocks every entity except privileged players and spectators (arrows, ender pearls, fireballs, shulker bullets etc. are stopped too).
  • Flexible privilege system:
    • global whitelist (/allowdeny whitelist ...),
    • per-block NBT whitelist stored on the item / block entity,
    • operator bypass (permission level 2, optionally requiring Creative mode).
  • Visual config screen - a "Config" button on the Mods screen when Mod Menu and Cloth Config are installed (both optional at runtime).
  • Full command suite for server-style control: /allowdeny config, /allowdeny whitelist, /allowdeny reload, /allowdeny query.
  • Live LAN sync - the host's config and whitelist are pushed to every connected player automatically.
  • Invisible border walls can be visualised with an optional red particle effect.

Why would you want it?

If you build adventure maps, mini-games or protected co-op areas in single-player or on a LAN host, this mod gives you Bedrock-grade build control: forbid building with Deny blocks, carve out buildable zones with Allow blocks, and seal off areas with unbreakable, impassable Border walls - without needing a full server setup.

Requirements

• Minecraft Java 1.21
• Fabric Loader >= 0.19.4 and Fabric API
• (optional) Mod Menu 11.x and Cloth Config 15.x for the config GUI

All players joining a LAN world need the same mod version installed.

Configuration

Graphical: Mods screen -> Bedrock Allow Deny Border -> Config. Command line (OP level 2): see the in-game help of /allowdeny, e.g.:

/allowdeny config borderMode bedrock_like
/allowdeny config borderMode block_all_entities
/allowdeny whitelist add <player>

Building from source

JDK 21+ required; see the GitHub repository for the toolchain versions.

./gradlew build

Artifacts land in build/libs/. CI automatically builds every push and publishes tagged releases.

License and credits

• License: MIT (see the LICENSE file inside the repository and the JAR).
• Authored and maintained by zihan_ds.
• Behavior follows the Bedrock / Education Edition Allow, Deny and Border blocks (see the Minecraft Wiki).
• Source code: https://github.com/zihan-ds/minecraft-bedrock-adb
• A Simplified Chinese user manual (Markdown) is included in the repository and inside the JAR.