Unstable Portals
by Vexillarius
Unstable Portals makes Nether portals collapse once they pass a set distance, so a player who travels too far needs to build a new one.
What it does
Nether portals are tracked by distance travelled. When a portal is used beyond a configured distance, it collapses and no longer works. The distance is set in the config file, and its default value is 10000. Changing it lets a server owner make portals last longer or shorter.
The mod is completely server-side, so players join without installing anything. It requires Fabric and is published for Fabric only, across seven release versions, 1.20 – 1.20.6. The latest file is 1.0.1 for 1.20.6, released on 2026-04-20. Settings are kept in the mod's config, and the mod is released under the MIT License, though it is not open source.
Key features
Distance-based collapse
A Nether portal stops working after the player passes the configured distance from it.
Configurable distance
The collapse distance is a setting in the config file, with a default of 10000.
Server-side operation
Only the server runs the mod, so players connect without any client-side install.
Config options
Available settings are read from the config file, so server owners can adjust the behavior without code changes.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Limiting long trips
A server owner who wants travel between the Overworld and Nether to cost more effort can shorten the collapse distance.
Keeping the default rules
Owners who want portals to last far longer can leave the default distance of 10000 in place.
Who it’s for: Server owners who want to limit how far Nether portals can be used. The mod is built for server administration and does not need to be installed by players, so it suits multiplayer worlds where portal reach should be controlled.
How it compares
Any size portals is server-side only and published for Fabric across 1.20.1 – 1.21.4, under All rights reserved, so it changes portal size rather than their reach. Linked Portals is also server-side only, but has files only for 1.20.4 and is under All rights reserved. Relative End Portals: Immersive Portals Edition is server required with client optional and under the MIT License, covering 1.19 – 1.21. Unstable Portals targets 1.20 – 1.20.6 and is server-side only.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Unstable Portals | Fabric | 1.20 – 1.20.6 | Server-side only | 2026-04-20 |
| Any size portals | Fabric | 1.20.1 – 1.21.4 | Server-side only | 2025-06-01 |
| Linked Portals | Fabric | 1.20.4 | Server-side only | 2024-03-20 |
| Relative End Portals: Immersive Portals Edition | Fabric | 1.19 – 1.21 | Server required, client optional | 2024-12-12 |
Questions
Does Unstable Portals need to be installed by players?
What loader does Unstable Portals use?
Can the collapse distance be changed?
In the catalog
Unstable Portals is one of 7,555 Cursed mods on ModsFinder, and one of 4,235 Cursed mods for Fabric. 11,154 mods support Minecraft 1.20.6.
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Similar mods
Official listing
- Modrinth page
- modrinth.com/mod/unstable-portals
- Owner
- Vexillarius
- Published
- 2026-04-18
- Updated on Modrinth
- 2026-04-20
- Facts verified
- 2026-10-15