Reflex Anticheat — Internals

Download Reflex Anticheat (+ Moonlight) for free

ℹ️ About

Reflex was a premium server-side anticheat for Minecraft (Bukkit), which was actively developed from 2016 to 2021. This repository serves as its primary legacy. It hosts the latest available anticheat version, which is downloadable and runnable for free; detailed low-level descriptions of Reflex's checks and techiques that it used to fight cheating and provide user friendliness; "stories" and reasoning on why the project was discontinued; and maybe more.

Everything in this repository is licensed under the CC BY 4.0 License (see the bottom of this file/page for details).

Many of the documents in this repository might seem large for most people, but a TL;DR version is provided in the beginning of most of them, which don't carry the emotion or some important nuances, but still outline the most important information (summary).

📚 Table of Contents

1. Maintenance / Story

   1.1. Why Reflex was discontinued

   1.2. The current state of Reflex and the dev team

2. Download the latest version of Reflex with all Reflex Moonlight features unlocked for free

3. Technical details

   3.1. Prerequisites

   3.2. KillAura checks (+ AimBot, AimAssist, TriggerBot, and some more)

   • 3.2.1. Description of the ka.acr check — Perfectly smooth rotations

   • 3.2.2. Description of the ka.blc check — "Lazy Aim" and aiming inconsistencies

   • 3.2.3. Description of the ka.ra check — "To click, or not to click" accuracy

   • 3.2.4. Description of the ka.yst check — Absurdly complicated statistical inference for Aimbot detection

   • 3.2.5. Description of the ka.ray check — Try to force players to actually look at their target and click properly

   3.3. Lag accounting

   • 3.3.1. Description of the badpcks.spf check — Abusing MC inventory to detect Ping Spoof / Fake Lag

   • 3.3.2. Reliable player lag detection techniques

   • 3.3.3. Analyze packets instead of events when possible

   3.4. Reflex Moonlight MC 1.8.x remote cheat files detection

   3.5. Spoofing health to break ESP and KillAura and even crash hacked clients

   3.6. Description of the badpcks.ign check — Detect and/or prevent Freecam and Blink

   3.7. Detecting ScaffoldWalk and Tower (building) hacks

💡 Notes

Contents disclosed in this repository are, of course, not exhaustive. There are quite many other checks and tricks in Reflex which will stay behind the curtains, at least for now. We may be expanding the list of published materials with new exciting stuff later (or maybe not). Anyway, we hope that the entire Minecraft community will benefit from this all in some way!

🤝 Contributors

Huge thanks to all people who had been helping us make Reflex awesome! As well to all the people who kept messaging us and spamming "free Reflex when". We really appreciated your interest in the project!

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⚖️ License

IMPORTANT: This repository also hosts some pics, just for the memes, which are used throughout the files. They belong to their respective owners (if any), no claims made for them by Reflex Development Team. If you have any problems with them, please let us know, and we'll address any issues immediately!

Reflex Anticheat Internals © 2023 by Reflex Development Team (DarksideCode (German), sinnlosername (Florian), StevenKGER (Steven), and others) is licensed under CC BY 4.0. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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