About Defixus Anti-Cheat
From ModrinthDefixus (Lex) - Client ↔ Server Mod that blocks cheated clients from the root and brings more control on your server. Also a QoL Admin tool. Free.
🛡️ Defixus: Anti-Cheat and QoL Admin Tool
🔒 The Ultimate Anti-Cheat Mod with Integrity Protection 🔒
Detect unauthorized resources • Verify file integrity • Monitor live changes • Resource hash analysis • Protect your community
Active Support: Minecraft 26.x and 1.21.11
⚡ 🔐 SHA-256 Verification & Client Inspector 🔐 ⚡
Defixus is a powerful anti-tampering and verification system for Fabric/Quilt and NeoForge servers, with lots of QoL features.
> A runtime-behavior anticheat is in development inside Defixus, consider help the project on Ko-fi
Geyser/Floodgate & ViaVersion/ViaBackwards authentication are supported
Unlike traditional "whitelist/blacklist" solutions with mod-id's, Defixus validates not only which mods are loaded, but also checks their integrity through SHA-256 checksum hashing and their behavior inspecting the binary files, ensuring that cheated, disguised or tampered clients cannot bypass server security policies defined by Defixus. Built for whether large or small communities that require a control over the client environment.
✨ Features
Give whether your SMP or Community clear client rules, share the resources your community needs, and keep useful administration tools close at hand.
- 📦 Mod and resource-pack rules with Allowlist, Checklist, Denylist and Mustlist.
- 🔐 SHA-256 integrity checks for reference files and the Defixus client.
- ⬇️ Required server resources, prepared with the player's approval before entering the world.
- 🔎 In-game client scans and individual or bulk client → server downloads.
- 🎨 Active resource-pack change reports and an option to block normal pack selection.
- 🖥️ An in-game settings panel, paginated chat reports and multiplayer server-list indicators.
- 🤖 A two-way Discord console, using your own bot running inside Minecraft (optional one-way Webhook console too).
- 📡 Discord event alerts, including configured player-issued commands, using Webhooks.
- 📊 Persistent server and player statistics.
- 🌍 Lot of client message languages, used for alerts, kicks and more.
> 📚 Start with installation, or visit the Defixus Wiki for the complete guides.
🛡️ Why Defixus?
Running a community server often means answering a simple question: which client resources belong here?
Here's a table which answers this question. Its important to understand what here is called 📦 resource and what are the 📋 Lists.
- A 📦 resource is either a 🧩 mod or a 🎨 resource pack.
| 📋 List | A 📦 resource in this list means that | |---|---| |
- ⚪ Allowed resources: a resource which is present in 🟢 Allowlist and 🔵 Mustlist, or that is present in 🟡 Checklist and matches the file integrity with the server's correspondent resource, is marked as
⚪ Allowed.
Highlights
From source dataGame versions
Supports 21 Minecraft versions, the newest being 26.3.
Loaders
Runs on Fabric, NeoForge and Quilt.
Footprint
Rated a light load on a server.
Defixus Anti-Cheat on Nxeon
From our catalogue- One-click install
- Supported on Nxeon Minecraft servers. We download it from Modrinth, place it, and restart the server.
- Server side
- Required on the server
- Server type needed
- Fabric, NeoForge, Quilt
- Server load
- light
- Smallest plan we suggest
- Minecraft — 2 GB (2 GB RAM). This follows our own load rating above, not a benchmark.
- Latest build
- 1.1.0-beta.1 (beta), released 2026-10-18
Game versions by loader
| Loader | Game versions | Newest |
|---|---|---|
| Fabric | 1.21.11 to 26.3 (6 versions) | 26.3 |
| NeoForge | 1.21.11 to 26.3 (6 versions) | 26.3 |
| Quilt | 26.3 | 26.3 |
From 14 recorded builds of Defixus Anti-Cheat.
Recent builds
| Build | Released | Game versions | Loaders |
|---|---|---|---|
| 1.1.0-beta.1 beta | 2026-10-18 | 26.3 | NeoForge |
| 1.1.0-beta.1 beta | 2026-10-18 | 26.2 | NeoForge |
| 1.1.0-beta.1 beta | 2026-10-18 | 26.1 to 26.1.2 (3 versions) | NeoForge |
| 1.1.0-beta.1 beta | 2026-10-18 | 1.21.11 | NeoForge |
| 1.1.0-beta.1 beta | 2026-10-18 | 26.3 | Fabric, Quilt |
| 1.1.0-alpha.1 alpha | 2026-10-03 | 26.3 | Fabric |
Dependencies
- Required: modrinth project P7dR8mSH (modrinth, not in our catalogue)
- Optional: modrinth project 9s6osm5g (modrinth, not in our catalogue)
- Optional: modrinth project mOgUt4GM (modrinth, not in our catalogue)
Declared by the newest build that lists any. Required ones are installed with it on one-click installs.
Run Defixus Anti-Cheat on a Minecraft server
Pick a server or deploy a new one above; it is installed in one click.
What kind of mod it is
From the catalogAdmin & protection
Permissions, moderation, anti-cheat and land protection for the people running the server.
Runs on your server
From source side supportModrinth lists Defixus Anti-Cheat as required on the server. Check its Modrinth page to see whether players need it too.
Compatibility
- Game
- Minecraft
- Loaders
- FabricNeoForgeQuilt
- Runs on
- Serverrequired on the server
- Game versions
- 26.3 and 20 earlier
Verified at the source
- ✓ModrinthOfficial listing, checked 2026-10-19Open ↗
- ✓AuthorKole07139, as published on Modrinth
- ✓LicenseLicenseRef-All-Rights-ReservedFree
