NeoAC

An anticheat for modern modded Minecraft servers running on NeoForge.

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Rent Server with this Mod

About this Mod

NeoAC

⚠️ ALPHA: Things may break! Do not use this in production.

An anticheat for modern modded Minecraft servers running on NeoForge.

Features

Mod ID and hash checks
Prevent login without the mod

Supported versions

Version	Support
1.21.1	Full

FAQ

Q: Will you support fabric?

A: If you ask one more time I will break your funny bone.
Q: Can you backport this to 1.x?

A: NO. I do not want to rewrite all the network code (it isn't much but it will be more in the future).
Q: Can you update this to 1.x?

A: Maybe if I have time for it.

Available Versions

NeoAC 0.1.0alpha

MC 1.21.1neoforge

June 18, 2025

How to Install NeoAC on Your Server

Order Server

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

Set neoforge Loader

In the panel under "Egg", select the neoforge loader and matching Minecraft version (1.21.1).

Install Mod

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

Compatibility

Mod Loaders

neoforge

Minecraft Versions

1.21.1

Server-side

✓ Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

NeoAC server crashes on startup – what to do?

Most common cause: wrong neoforge 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 (1.21.1). You can switch loaders with one click in the panel.

Is NeoAC compatible with neoforge?

NeoAC officially supports neoforge for Minecraft 1.21.1. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with NeoAC – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if NeoAC 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.