CdrDimensionGuard

CdrDimensionGuard is a lightweight Paper plugin designed to completely block player access to the Nether and The End.

Unlike a simple portal blocker, CdrDimensionGuard protects dimension access from multiple teleport methods. Players are prevented from entering blocked dimensions through portals, commands, End Gateways, spectator teleportation, or other plugins.

Even server operators are blocked by default. There is no OP bypass.

Features

• Hard blacklist for the Nether and The End
• Blocks Nether Portal access
• Blocks End Portal access
• Blocks End Gateway teleportation
• Blocks command-based teleportation
• Blocks teleportation performed by other plugins
• Blocks spectator teleportation
• Detects blocked dimensions by world environment
• No OP bypass
• Stores the player's last safe location
• Automatically returns players if they somehow enter a blocked dimension
• Login recovery for players saved inside a blocked dimension
• Automatic fallback to a safe world spawn
• Lightweight dimension watchdog
• No external dependencies required

How It Works

CdrDimensionGuard does not disable the Nether or The End itself.

The dimensions can remain enabled and loaded by the server, while player access is completely restricted.

Example:

Overworld
↓
Nether Portal
↓
CdrDimensionGuard
↓
ACCESS DENIED
↓
Player remains in the safe world

The same protection applies to The End.

Failsafe Protection

CdrDimensionGuard uses multiple protection layers.

1. Teleport attempts are blocked before the player changes dimensions.

2. If another plugin or mechanic somehow moves the player into a blocked dimension, the plugin automatically returns them to their last safe location.

3. A watchdog provides an additional recovery layer for players detected inside restricted dimensions.

4. Players who reconnect while located inside a blocked dimension are automatically recovered.

Installation

1. Stop your server.
2. Place CdrDimensionGuard.jar inside the plugins folder.
3. Start the server.
4. Verify that CdrDimensionGuard is enabled in the console.

No additional plugins are required.

Requirements

• Paper
• Minecraft 1.21.11
• Java 21+
• No dependencies

Blocked Dimensions

By default:

• Nether
• The End

The plugin detects dimensions using their Minecraft world environment rather than relying only on world names.

This means custom worlds using the NETHER or THE_END environment can also be protected.

Important

CdrDimensionGuard is designed as a hard dimension lock.

Operators do not automatically bypass the restriction, making it suitable for servers where dimensions must remain inaccessible until a progression system, event, season, or administrator decision unlocks them.

Created by CADERA / MENKIESTES