No Connect

Prevents connection to remote (mostly)

415 Downloads

forgeneoforgecursed

Rent Server with this Mod

About this Mod

License Notice

Any usage of this project is subjected to the terms of the license of this project, (see License).

NoConnect

Definitely for user that willing to break their online experiences. Therefore, issues that occur when using this should be reported here.

Prevent connections to remote* (mostly) but not limited to, such as update, joining server, etc.
*Except localhost resources and default allowed hosts.

Credit to contributors of https://github.com/InfinityStudio/NonUpdate for references.

Note

This is a modlauncher ITransformationService "plugin". It will not show in mod menu.

As in Java 24, this "plugin" will not work. The infrastructure behind it is permanently removed, see https://openjdk.org/jeps/486.
The author will attempt to find an suitable alternative to supplement it in the future.

This "plugin" requires java.lang.SecurityManager, which is terminally deprecated (JEP-411) in Java 17+.
In Java 18, -Djava.security.manager=allow is required in command line, see https://bugs.openjdk.org/browse/JDK-8275671

By default, the following hosts listed below are allowed.

*.minecraft.net
*.minecraftservices.com
*.mojang.com

You can change this in ./config/noconnect.toml Requires restart to take effect.

Tested with Minecraft Forge 1.14.x - 1.21.4.
Tested with NeoForge 1.21.1 - 1.21.4.

License

Licensed under the Open Software License version 3.0, see LICENSE for more details.

Attributions

This project contain code segment that referenced from
OkHttp,
licensed under Apache 2.0.

Available Versions

0.4.7beta

MC 1.14.4, 1.15, 1.15.1, 1.15.2, 1.16, 1.16.1, 1.16.2, 1.16.3, 1.16.4, 1.16.5, 1.17, 1.17.1, 1.18, 1.18.1, 1.18.2, 1.19, 1.19.1, 1.19.2, 1.19.3, 1.19.4, 1.20, 1.20.1, 1.20.2, 1.20.3, 1.20.4, 1.20.5, 1.20.6, 1.21, 1.21.1, 1.21.2, 1.21.3, 1.21.4forge, neoforge

January 1, 2025

0.4.6beta

MC 1.14.4, 1.15, 1.15.1, 1.15.2, 1.16, 1.16.1, 1.16.2, 1.16.3, 1.16.4, 1.16.5, 1.17, 1.17.1, 1.18, 1.18.1, 1.18.2, 1.19, 1.19.1, 1.19.2, 1.19.3, 1.19.4, 1.20, 1.20.1forge

December 31, 2023

How to Install No Connect on Your Server

Order Server

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

Set forge Loader

In the panel under "Egg", select the forge loader and matching Minecraft version (1.21.4).

Install Mod

Open the mod browser in the dashboard and search for "No Connect". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

forgeneoforge

Minecraft Versions

1.21.4, 1.21.3, 1.21.2 (+29 more)

Server-side

~ Optional

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

No Connect server crashes on startup – what to do?

Most common cause: wrong forge 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 (1.21.4). You can switch loaders with one click in the panel.

Is No Connect compatible with forge and neoforge?

No Connect officially supports forge, neoforge for Minecraft 1.21.4, 1.21.3, 1.21.2. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with No Connect – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if No Connect 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.