Block Blocker

Block Blocker

Event Prevention for Blocks

by
9.0K Downloads
fabricforgeneoforgeutility
Rent Server with this Mod

About this Mod

 

 

There are a few cases in the course of modding history where it is evident that a mechanism is required to prevent the breaking or placing of blocks into the Minecraft world. This mod provides a configuration that allows a server administrator to specify the blocks that they do not want to be breakable nor to be placed.

 

For example:

In some versions of Ice and Fire there exists a pixie house that is world gen'd in and when it is broken the client and server both crash. To prevent this you would add the ID for the pixie house to the configuration and restart your server. Now no one can break the block and crash the server.

 

There may be other cases where you would want this behavior.

 

Another example:

You have a hard mode pack and you want to make it harder, therefore you add other blocks to the list to prevent them from being broken much like bedrock. Stone, Gravel, Sand could be some. 

 

Similarly why stop there, maybe there are certain blocks in your world that have crafting uses but you don't want to see them placed in your world. For instance you don't want people building dirt towers or lava sources. You would add those ID's to the prevent-placement section of the configuration and restart your server.

 

 

 

The mod is not required on the client but can exist and run there as well, which is great for LAN and Hamachi play too.

 

The following example config is the config that generates when you first run the mod, this way you can prepopulate the config the with blocks you want to block for placing and harvesting.

 

blockblocker.cfg

 

Notes

Does not block fluid placement. There is an excellent mod that does that already found at https://www.curseforge.com/minecraft/mc-mods/no-lava-bucketing

 

Now ported to 1.7.10

 

None of the versions support title entities or nbt data. Possibly planned, but can't say when, a fat donation of higher than $20 at https://patreon.com/kreezxil can speed up this process. Make sure you send me a message via private what your donation email was and what it was for.

 

Modpacks

No need to ask, just add. A link back not required but sure would be sweet.

 

Reviewers

Go ahead. Let me know and I'll feature it. I only ask that you link back to this page in your review description.

 

 

 

Available Versions

Block Blocker 1.13.0release
MC 1.21.11neoforge
March 19, 2026
Block Blocker 1.12.0release
MC 1.21.11fabric
March 19, 2026
Block Blocker 1.11.0release
MC 1.21.4fabric
April 28, 2025
Block Blocker 1.12.0release
MC 1.21.4neoforge
April 28, 2025
Block Blocker 1.11.0release
MC 1.21.1neoforge
November 2, 2024

How to Install Block Blocker on Your Server

1

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

2

Set fabric Loader

In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.11).

3

Install Mod

Open the mod browser in the dashboard and search for "Block Blocker". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

fabricforgeneoforge

Minecraft Versions

1.21.11, 1.21.4, 1.21.1 (+12 more)

Server-side

Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Block Blocker server crashes on startup – what to do?

Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.11). You can switch loaders with one click in the panel.

Is Block Blocker compatible with fabric and forge and neoforge?

Block Blocker officially supports fabric, forge, neoforge for Minecraft 1.21.11, 1.21.4, 1.21.1. Note: Forge and Fabric mods are NOT cross-compatible – pick one loader and stick with it. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Block Blocker – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Block Blocker consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.

Rent Modded Server

Install Block Blocker with just one click on your server.

Recommended RAM
4 GBab €8/mo
Min. 3 GB | +1 GB pro 8 Spieler
Create Server Now
1-Click Mod Install
NVMe SSD Storage
DDoS Protection included

Details

License
MIT License
Server-side
Required

Supported Versions

1.21.111.21.41.21.11.20.41.20.21.20.11.19.41.19.31.19.21.18.2+5 more