DimensionController is a utility Minecraft plugin that allows administrators to temporarily disable access to any world or dimension. Players, mobs, items, and all other entities are completely blocked from entering disabled dimensions, regardless of the method (portals, commands, plugins, etc.).

Features:
Commands
(requires admin or dimensioncontroller.* permission):

/dimensioncontroller or /dico – main command

/dico disable <world> – disables a world/dimension (e.g., nether, the_end, or any other existing world)

/dico enable <world> – re-enables a world/dimension

/dico info – shows the current status

Complete Protection:
Disabled dimensions are completely blocked for all entities (players, mobs, items, boats, minecarts, armor stands, etc.)

Tab Completion:
Commands support auto-completion for worlds and actions

Instant Save:
Changes are saved automatically without restarting the server (if supported)