{"id":103055,"date":"2026-06-06T01:11:43","date_gmt":"2026-06-05T22:11:43","guid":{"rendered":"https:\/\/vpesports.com\/minecraft\/mods\/mirroranticheat\/"},"modified":"2026-06-06T01:11:43","modified_gmt":"2026-06-05T22:11:43","slug":"mirroranticheat","status":"publish","type":"mod","link":"https:\/\/vpesports.com\/minecraft\/mods\/mirroranticheat\/","title":{"rendered":"Mirror AntiCheat"},"content":{"rendered":"

<\/p>\n

![Modrinth Icon](https:\/\/modrinth.com\/project\/v4yw0pI3)
\n![Github Icon](https:\/\/github.com\/Solmeye\/Mirror-Anticheat)
\n![Discord Icon](https:\/\/discord.gg\/FVq3j5heAc)<\/p>\n

<\/p>\n

![Fabric Icon](https:\/\/fabricmc.net\/)
\n![Quilt Icon](https:\/\/quiltmc.org\/)
\n![NeoForge Icon](https:\/\/neoforged.net\/)
\n![Forge Icon](files.minecraftforge.net)<\/p>\n

![Paper Icon](https:\/\/papermc.io\/)
\n![Spigot Icon](https:\/\/www.spigotmc.org\/)
\n![Bukkit Icon](https:\/\/dev.bukkit.org\/)
\n![Purpur Icon](http:\/\/purpurmc.org\/)<\/p>\n

<\/center><\/p>\n

___<\/p>\n

Mirror AntiCheat is a server-side anti-cheat designed to help server administrators detect cheating, malicious behavior, and alternate accounts, while providing tools to investigate.<\/p>\n

The project focuses on being compatible with the latest Minecraft version (26.1+) and avoiding any false flag.<\/p>\n

This project uses mixins to filter and analyze at the packet level.
\nHowever, these mixins are currently not at a low enough level to be completely compatible with other mods<\/p>\n

## Dependency
\nThis mod requires Ignite to work with Paper, Spigot, Bukkit and Purpur.<\/p>\n

## Next updates
\n***You can suggest on the Github or on the Discord***<\/p>\n

– Support for Sponge
\n– Configuration for ingoing and outgoing packets
\n– Option to disable the auto antialt check
\n– Fix #1
\n– Fix #2
\n– `\/mirror freeze` command<\/p>\n

## Known bugs<\/p>\n

\nClients receive a damage tilt when their food levels change and their health are not full<\/summary>\n

– https:\/\/github.com\/Solmeye\/Mirror-Anticheat\/issues\/1
\n– Versions : `0.38.0-alpha`
\n– Loader : `Paper`<\/p>\n<\/details>\n

\nThe client can decide when to use the auto resolver
\n<\/summary>\n

When the client finishes loading a world, it sends the packet handleAcceptPlayerLoad, which automatically triggers the autoresolver.
\nThis happens with a Vanilla client, during a change of world (Overworld to Nether)<\/p>\n

– https:\/\/github.com\/Solmeye\/Mirror-Anticheat\/issues\/2
\n– Version : `0.38.0-alpha`
\n– Loader : `All`<\/p>\n<\/details>\n

## Packet analysis
\n### Ingoing
\n*The following incoming packets are scanned for impossible or suspicious behavior*<\/p>\n

[None]<\/p>\n

### Outgoing
\n*Subsequent outgoing packets are filtered and fake the data when a Vanilla client cannot distinguish the difference.
\nThis is done in order to prevent or limit the effectiveness of a cheat*<\/p>\n

\nClientboundPlayerCombatEndPacket<\/summary>\n

– Packet<\/p>\n

> Cancelled<\/p>\n<\/details>\n

\nClientboundPlayerCombatEnterPacket<\/summary>\n

– Packet<\/p>\n

> Cancelled<\/p>\n<\/details>\n

\nClientboundSetExperiencePacket<\/summary>\n

– Field `ExperienceProgress`<\/p>\n

> Lossless scrambling value accuracy<\/p>\n

> [To implement] Hides the value when it is not supposed to be exploitable (eg.when the locator bar is used)<\/p>\n

– Field `TotalExperience`<\/p>\n

> Hides the value<\/p>\n<\/details>\n

\nClientboundSetHealthPacket<\/summary>\n

– Packet<\/p>\n

> Cancelled when the packet only update the saturation<\/p>\n

– Field `Health`<\/p>\n

> Lossless scrambling value accuracy<\/p>\n

> [To implement] Hides the value when it is not supposed to be exploitable (eg.when the gamemode is creative)<\/p>\n

– Field `Food`<\/p>\n

> [To implement] Hides the value when it is not supposed to be exploitable (eg.when riding a horse)<\/p>\n

– Field `Saturation`<\/p>\n

> Hides the value<\/p>\n<\/details>\n

## Commands
\n– `\/mirror`
\nDisplays the mod version<\/p>\n

– `\/mirror info`
\nDisplays the mod version<\/p>\n

– `\/mirror version`
\nDisplays the mod version<\/p>\n

– `\/mirror discord`
\nDisplays the Discord link<\/p>\n

– `\/mirror modrinth`
\nDisplays the Modrinth link<\/p>\n

– `\/mirror reload`
\nReload the configuration<\/p>\n

– `\/mirror profile `
\nDisplays a player’s profile (IP, latency, brand…)<\/p>\n

– `\/mirror alt `
\nTry to detect alternative accounts<\/p>\n

– `\/mirror crash `
\nCrashes a player’s client<\/p>\n

– `\/mirror schedule

– `\/mirror data `
\nWrites data to the json file associated with the player.s
\nSee https:\/\/datatracker.ietf.org\/doc\/html\/rfc6901<\/p>\n

– `\/mirror webhook `
\nSend a message through the webhook<\/p>\n

– `\/mirror resolve `
\nResolves translation keys. Useful for detecting some resource packs or mods.<\/p>\n

## Configuration<\/p>\n

\nDefault configuration<\/summary>\n

“`
\n{
\n “key”: [
\n {
\n “identifier”: “minecraft”,
\n “keys”: [
\n “key.forward”,
\n “key.left”,
\n “key.back”,
\n “key.right”,
\n “key.jump”,
\n “key.sneak”,
\n “key.sprint”,
\n “key.inventory”,
\n “key.swapOffhand”,
\n “key.drop”,
\n “key.use”,
\n “key.attack”,
\n “key.pickItem”,
\n “key.chat”,
\n “key.playerlist”,
\n “key.command”,
\n “key.socialInteractions”,
\n “key.screenshot”,
\n “key.togglePerspective”,
\n “key.smoothCamera”,
\n “key.fullscreen”,
\n “key.advancements”,
\n “key.quickActions”,
\n “key.toggleGui”,
\n “key.toggleSpectatorShaderEffects”,
\n “key.hotbar.1”,
\n “key.hotbar.2”,
\n “key.hotbar.3”,
\n “key.hotbar.4”,
\n “key.hotbar.5”,
\n “key.hotbar.6”,
\n “key.hotbar.7”,
\n “key.hotbar.8”,
\n “key.hotbar.9”,
\n “key.saveToolbarActivator”,
\n “key.loadToolbarActivator”,
\n “key.spectatorOutlines”,
\n “key.spectatorHotbar”,
\n “key.debug.overlay”,
\n “key.debug.modifier”,
\n “key.debug.crash”,
\n “key.debug.reloadChunk”,
\n “key.debug.showHitboxes”,
\n “key.debug.clearChat”,
\n “key.debug.showChunkBorders”,
\n “key.debug.showAdvancedTooltips”,
\n “key.debug.copyRecreateCommand”,
\n “key.debug.spectate”,
\n “key.debug.switchGameMode”,
\n “key.debug.debugOptions”,
\n “key.debug.focusPause”,
\n “key.debug.dumpDynamicTextures”,
\n “key.debug.reloadResourcePacks”,
\n “key.debug.profiling”,
\n “key.debug.copyLocation”,
\n “key.debug.dumpVersion”,
\n “key.debug.profilingChart”,
\n “key.debug.fpsCharts”,
\n “key.debug.networkCharts”,
\n “key.debug.lightmapTexture”
\n ],
\n “commandsOnEachFound”: [
\n “mirror data %s “fingerprint\/translations\/%c\/0” “%t””,
\n “mirror data %s “fingerprint\/translations\/%c\/1” “%k””
\n ],
\n “commandsOnEachNotFound”: [
\n “kick %s Please remove your anti translation exploit software”
\n ],
\n “autoresolve”: true
\n }
\n ],
\n “antiAlt”: {
\n “scoreSuspicious”: 65,
\n “scoreConfirmed”: 90,
\n “scoreNormalCommand”: [],
\n “scoreSuspiciousCommand”:
\n “mirror webhook “`%s` is suspected of alting with [%i\\\\n-# Matching score : `%m`””
\n ],
\n “scoreConfirmedCommand”:
\n “mirror webhook “`%s` is probably alting with [%i\\\\n-# Matching score : `%m`\\\\n-# Automatic action executed””,
\n “mirror crash %s”,
\n “ban %s Alting”
\n ]
\n },
\n “delayAntiAltCheck”: 30,
\n “ingoingFilter”: {},
\n “outgoingFilter”: {
\n “ClientboundSetHealthPacket”: {
\n “enabled”: true,
\n “options”: {
\n “fakeSaturation”: 20.0
\n }
\n }
\n },
\n “webhook”: “”,
\n “version”: 1
\n}
\n“`<\/p>\n<\/details>\n

\nExplanation<\/summary>\n

– `key`<\/p>\n

– `identifier` Identifier where the key comes from.
\nUsed for display purposes only<\/p>\n

– `keys` Key list<\/p>\n

– `commandsOnEachFound` Command to execute for each key when resolved by autoresolve<\/p>\n

– `commandsOnEachNotFound` Command to execute for each key when not resolved by autoresolve<\/p>\n

– `autoresolve` Automatically resolves this key group when connecting a player or not<\/p>\n

– `antiAlt`<\/p>\n

– `scoreSuspicious` Threshold to execute the commands associated. When the matching alt value is higher than `scoreSuspicious`, it means that the match is suspicious and needs investigation. Min `0` Max `100`<\/p>\n

– `scoreConfirmed` Threshold to execute the commands associated. When the matching alt value is higher than `scoreConfirmed`, it means that the match is confirmed an is an alternative account. Min `0` Max `100`<\/p>\n

– `scoreNormalCommand` Commands executed when the matching score is not suspicious or confirms an alt<\/p>\n

– `scoreSuspiciousCommand` Commands executed when the matching score is suspicious<\/p>\n

– `scoreConfirmedCommand` Commands executed when the matching score confirms an alt.<\/p>\n

– `delayAntiAltCheck`
\n(In ticks) Delay before checking for alts after that a player joined your server. Higher values makes it easier to disconnect to avoid the scan.<\/p>\n

– `webhook`
\nWebhook of your Discord Webhook<\/p>\n

– `version`
\nVersion of the configuration. Do not touch!<\/p>\n<\/details>\n

## AntiAlt
\nThe antialt system is not explained in detail to avoid easy bypass.<\/p>\n

## FAQ
\n### How does this mod work?
\nMirror AntiCheat modifies outgoing network packets to remove or alter data that a vanilla client does not rely on. This is intended to reduce unnecessary information exposure without affecting normal gameplay.<\/p>\n

### Is it possible to have a false flag?
\nNormally, no, with the default values.<\/p>\n

### What is the impact on performance?
\nCurrently, no statistics have been compiled on the CPU impact. The impact can only be negative.
\nHowever, due to the reduction in packets sent, bandwidth can be decreased.<\/p>\n

### Will this mod backport to previous versions of Minecraft 26.1?
\nNo.<\/p>\n

### Can I install it on my client?
\nYes. Please note, however, that this project may not work correctly if done.<\/p>\n

### What version should I update this project to?
\nAlpha versions may have unstable behavior.<\/p>\n

Beta versions are relatively stable and will not pose a problem.<\/p>\n

Releases are the most stable.<\/p>\n

It is recommended to update this project to the latest beta or stable version, as appropriate<\/p>\n

### Is this compatible with [mod]?
\nTo date, no incompatibilities have been reported. If you encounter any, please let me know.<\/p>\n

## Support me!
\nJoin my Hardcore Minecraft server: `38.143.19.130:51965`<\/p>\n","protected":false},"excerpt":{"rendered":"

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