Inertia Anti Cheat Mod (1.21.8, 1.20.1) – Enforce Modpack Integrity on Your Server

Inertia Anti Cheat Mod (1.21.8, 1.20.1) is a lightweight yet powerful server-side tool built for Fabric and Quilt mod loaders, designed to help server owners maintain strict control over client-side modifications. By verifying the mod list of each connecting player, this mod ensures that only allowed mods are used, making it ideal for competitive or modpack-based servers that require consistent client environments.

Whether you’re running a tightly curated modpack or simply want to block cheat clients and performance-altering mods, Inertia Anti Cheat offers the enforcement tools you need to protect your server from unfair gameplay.

Features:

• Client Mod List Verification:
  Automatically checks every player’s client mod list when they attempt to join the server. Players lacking the required client mod are instantly kicked.
• Blacklist, Whitelist, and Hash-Based Enforcement:
  Server admins can configure either a:
  • Whitelist of approved mods,
  • Blacklist of disallowed ones, or
  • Modpack Hash (to enforce exact modlist matching).
    Non-compliant players are prevented from joining the server.
• Bypass Permission Node:
  Players with the inertiaanticheat.bypass permission can skip mod checks ideal for admins, testers, or trusted users.
• Server-Side Enforcement Only:
  Does not require the mod to be installed client-side unless part of the enforcement config ideal for centralized server control.
• Flexible Configuration:
  Easily customize verification methods and permissions through config files.
• Fabric and Quilt Compatible:
  Fully supports modern Minecraft mod loader environments.

Screenshots:

Requires:

Fabric API or Quilt Loader

How to install:

How To Download & Install Mods with Minecraft Forge

How To Download & Install Fabric Mods

How To Download & Install The Quilt Loader

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Why Use Inertia Anti Cheat?

In an age where many players use modded clients, server integrity becomes increasingly difficult to maintain especially for PvP servers, questing modpacks, or cooperative survival realms. Inertia Anti Cheat offers a streamlined solution to verify clients and enforce mod rules without the need for bloated plugin systems or external launchers.

If you’re a server owner aiming for a level playing field and consistent experience, this mod is a must-have to keep your environment clean, fair, and trustworthy.