✅ LPX 1.8-1.21✅ BEST ANTI-EXPLOIT/CRASHER

Ytnoos · Feb 16, 2024

Ytnoos updated LPX AntiPacketExploit with a new update entry:

UPDATE 3.4.1 NEW CHECKS

Added new check TabB
Added more details to some FlagInfos
Added option to set min-vl to -1 to avoid flags
Reduced FloodB falses
Removed old unusued code
Option to customize item decoding disabling
Maybe fixed bStats

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Ytnoos · Feb 16, 2024

Ytnoos updated LPX AntiPacketExploit with a new update entry:

UPDATE 3.4.2

Improved TabB check

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Ytnoos · Feb 17, 2024

Ytnoos updated LPX AntiPacketExploit with a new update entry:

UPDATE 3.4.3

Fixed NettyA check
Improved FloodC FloodD FloodE
New default config changes
Made PacketEvents a lot safer
Added size into packetlogger
Performance improvements

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Ytnoos · Feb 17, 2024

Ytnoos updated LPX AntiPacketExploit with a new update entry:

UPDATE 3.4.3

Removed FloodE debug oops

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Ytnoos · Feb 19, 2024

Ytnoos updated LPX AntiPacketExploit with a new update entry:

UPDATE 3.4.4

New check PayloadF

Now supporting all 1.8-1.20.4 versions

Fixed FloodC falses

Fixed kick message chat color on newer versions

Fixed logs not correctly saving if the file already existed

Configurable TabB characters

Default config changes to prevent false flags

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Ytnoos · Feb 28, 2024

Ytnoos updated LPX AntiPacketExploit with a new update entry:

UPDATE 3.4.5

Improved way to count remaining bytes

Implemented many limits to PacketEvents readings

Implemented option to kick a player during exceptions

Fixed FloodB/C/D falses

Fixed log file writing (now appends)

Fixed some checks not always working

Fixed silent failures option

Changed default config values

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Ytnoos · Apr 29, 2024

Ytnoos updated LPX AntiPacketExploit with a new update entry:

UPDATE 3.4.6

Fixed compatibility with new ViaVersion for 1.20.5

Fixed CreativeG/B exceptions

Changed default config value for CreativeC

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Ytnoos · Jun 2, 2024

Ytnoos updated LPX AntiPacketExploit with a new update entry:

UPDATE 3.4.7

1.20.5/6 Support
Added Discord Webhook
Updated PacketEvents
General Improvements

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Ytnoos · Jul 5, 2024

Ytnoos updated LPX AntiPacketExploit with a new update entry:

UPDATE 3.4.8

1.21 support

Fixed discord webhook exception

Removed heavy packet log for first packets

Changed Metrics class

Fixed critical multi thread issue

Updated PacketEvents

General improvements

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Ytnoos · Jul 5, 2024

Ytnoos updated LPX AntiPacketExploit with a new update entry:

UPDATE 3.4.8

1.21 support

Fixed discord webhook exception

Removed heavy packet log for first packets

Changed Metrics class

Fixed critical multi thread issue

Updated PacketEvents

General improvements

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smscentras · Jul 15, 2024

Ytnoos said:
Ytnoos updated LPX AntiPacketExploit with a new update entry:

UPDATE 3.4.8

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Missed one:

Code:

[ERROR]: Failed to handle packet net.minecraft.network.protocol.game.PacketPlayInUseItem@6619f0d1, suppressing error
java.lang.IllegalArgumentException: Expected packet sequence nr >= 0
        at net.minecraft.server.network.ServerGamePacketListenerImpl.ackBlockChangesUpTo(ServerGamePacketListenerImpl.java:2176) ~[?:?]
        at net.minecraft.server.network.ServerGamePacketListenerImpl.handleUseItemOn(ServerGamePacketListenerImpl.java:1976) ~[?:?]
        at net.minecraft.network.protocol.game.ServerboundUseItemOnPacket.handle(ServerboundUseItemOnPacket.java:37) ~[?:?]
        at net.minecraft.network.protocol.game.ServerboundUseItemOnPacket.a(ServerboundUseItemOnPacket.java:9) ~[?:?]
        at net.minecraft.network.protocol.PacketUtils.lambda$ensureRunningOnSameThread$0(PacketUtils.java:54) ~[?:?]
        at net.minecraft.server.TickTask.run(TickTask.java:18) ~[purpur-1.20.4.jar:git-Purpur-2176]
        at net.minecraft.util.thread.BlockableEventLoop.doRunTask(BlockableEventLoop.java:149) ~[?:?]
        at net.minecraft.util.thread.ReentrantBlockableEventLoop.doRunTask(ReentrantBlockableEventLoop.java:24) ~[?:?]
        at net.minecraft.server.MinecraftServer.doRunTask(MinecraftServer.java:1498) ~[purpur-1.20.4.jar:git-Purpur-2176]
        at net.minecraft.server.MinecraftServer.d(MinecraftServer.java:194) ~[purpur-1.20.4.jar:git-Purpur-2176]
        at net.minecraft.util.thread.BlockableEventLoop.pollTask(BlockableEventLoop.java:123) ~[?:?]
        at net.minecraft.server.MinecraftServer.pollTaskInternal(MinecraftServer.java:1475) ~[purpur-1.20.4.jar:git-Purpur-2176]
        at net.minecraft.server.MinecraftServer.pollTask(MinecraftServer.java:1398) ~[purpur-1.20.4.jar:git-Purpur-2176]
        at net.minecraft.util.thread.BlockableEventLoop.managedBlock(BlockableEventLoop.java:133) ~[?:?]
        at net.minecraft.server.MinecraftServer.waitUntilNextTick(MinecraftServer.java:1376) ~[purpur-1.20.4.jar:git-Purpur-2176]
        at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1265) ~[purpur-1.20.4.jar:git-Purpur-2176]
        at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:323) ~[purpur-1.20.4.jar:git-Purpur-2176]
        at java.lang.Thread.run(Thread.java:1583) ~[?:?]

Ytnoos · Jul 15, 2024

smscentras said:

Missed one:

Code:

[ERROR]: Failed to handle packet net.minecraft.network.protocol.game.PacketPlayInUseItem@6619f0d1, suppressing error
java.lang.IllegalArgumentException: Expected packet sequence nr >= 0
        at net.minecraft.server.network.ServerGamePacketListenerImpl.ackBlockChangesUpTo(ServerGamePacketListenerImpl.java:2176) ~[?:?]
        at net.minecraft.server.network.ServerGamePacketListenerImpl.handleUseItemOn(ServerGamePacketListenerImpl.java:1976) ~[?:?]
        at net.minecraft.network.protocol.game.ServerboundUseItemOnPacket.handle(ServerboundUseItemOnPacket.java:37) ~[?:?]
        at net.minecraft.network.protocol.game.ServerboundUseItemOnPacket.a(ServerboundUseItemOnPacket.java:9) ~[?:?]
        at net.minecraft.network.protocol.PacketUtils.lambda$ensureRunningOnSameThread$0(PacketUtils.java:54) ~[?:?]
        at net.minecraft.server.TickTask.run(TickTask.java:18) ~[purpur-1.20.4.jar:git-Purpur-2176]
        at net.minecraft.util.thread.BlockableEventLoop.doRunTask(BlockableEventLoop.java:149) ~[?:?]
        at net.minecraft.util.thread.ReentrantBlockableEventLoop.doRunTask(ReentrantBlockableEventLoop.java:24) ~[?:?]
        at net.minecraft.server.MinecraftServer.doRunTask(MinecraftServer.java:1498) ~[purpur-1.20.4.jar:git-Purpur-2176]
        at net.minecraft.server.MinecraftServer.d(MinecraftServer.java:194) ~[purpur-1.20.4.jar:git-Purpur-2176]
        at net.minecraft.util.thread.BlockableEventLoop.pollTask(BlockableEventLoop.java:123) ~[?:?]
        at net.minecraft.server.MinecraftServer.pollTaskInternal(MinecraftServer.java:1475) ~[purpur-1.20.4.jar:git-Purpur-2176]
        at net.minecraft.server.MinecraftServer.pollTask(MinecraftServer.java:1398) ~[purpur-1.20.4.jar:git-Purpur-2176]
        at net.minecraft.util.thread.BlockableEventLoop.managedBlock(BlockableEventLoop.java:133) ~[?:?]
        at net.minecraft.server.MinecraftServer.waitUntilNextTick(MinecraftServer.java:1376) ~[purpur-1.20.4.jar:git-Purpur-2176]
        at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1265) ~[purpur-1.20.4.jar:git-Purpur-2176]
        at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:323) ~[purpur-1.20.4.jar:git-Purpur-2176]
        at java.lang.Thread.run(Thread.java:1583) ~[?:?]

Please use discord to report things

Ytnoos · Aug 28, 2024

Ytnoos updated LPX AntiPacketExploit with a new update entry:

UPDATE 3.4.9

Updated PacketEvents
Fixed some potential PacketEvents exploits
Added option to prevent non-ascii books
Default config changes
Fixed log saving without new line
Minor changes and improvements
Reduced load time
Reduced ram usage from 100MB minimum to 10-20MB maximum
Fixed 1.21 and added support for 1.21.1

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Ytnoos · Aug 28, 2024

Ytnoos updated LPX AntiPacketExploit with a new update entry:

UPDATE 3.4.9

Updated PacketEvents

Fixed some potential PacketEvents exploits

Added option to prevent non-ascii books

Default config changes

Fixed log saving without new line

Minor changes and improvements

Reduced load time

Reduced ram usage from 100MB minimum to 10-20MB maximum

Fixed 1.21 and added support for 1.21.1

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Ytnoos · Aug 28, 2024

Ytnoos updated LPX AntiPacketExploit with a new update entry:

UPDATE 3.4.9

Updated PacketEvents

Fixed some potential PacketEvents exploits

Added option to prevent non-ascii books

Default config changes

Fixed log saving without new line

Minor changes and improvements

Reduced load time

Reduced ram usage from 100MB minimum to 10-20MB maximum

Fixed 1.21 and added support for 1.21.1

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Ytnoos · Sep 11, 2024

Ytnoos updated LPX AntiPacketExploit with a new update entry:

UPDATE 3.4.10

Implemented BookA to avoid 1.20/1.21 dupes with book title length

Updated PacketEvents

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Ytnoos · Oct 13, 2024

Ytnoos updated LPX AntiPacketExploit with a new update entry:

UPDATE 3.4.11

Fixed exception with datapacks (RAM usage increase a bit due to this)

hidden-command now hides LPX from tab completion

Re-added API service registration to allow LPX API usage

Updated PacketEvents

Maybe fixed some bypasses?

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Ytnoos · Nov 10, 2024

Ytnoos updated LPX AntiPacketExploit with a new update entry:

UPDATE 3.5.0 DOUBLE-SIDED LPX

USE IT AT YOUR OWN RISK, RESTORING THE CONFIG FROM 0 IS RECOMMENDED
This version can be considered as a BETA, I heavily tested it on my network but the real stability will come from customers reporting problems.

This version brings LPX to a very more powerful layer of protection, now LPX decodes packets ALSO before ViaVersion trying to avoid exploiters to abuse ViaVersion's lack of limit checks.

I worked so hard on this version since the work was also to edit PacketEvents in order to...

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Ytnoos · Dec 9, 2024

Ytnoos updated LPX AntiPacketExploit with a new update entry:

UPDATE 3.5.1

Added support for 1.21.4 clients

Fixed support for servers without ViaVersion

Reworked many Item checks

Added ItemG/H in BETA (disabled by default)

Improved performance for block state with Paper APIs

Fixed character replacements while editing book

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Ytnoos · Jan 1, 2025

Ytnoos updated LPX AntiPacketExploit with a new update entry:

UPDATE 3.5.2

HAPPY NEW YEAR!

Improved ItemG

Fixed many ItemStack/NBT crash exploits of existing checks

Fixed compatibility with AxiomPaper

Implemented LPXPunishEvent API

Fixed 1.7.10 clients exception+kick while tab completing

Put packet logger into external daemon thread

Prevent packet logger to print in multiple lines (xynis new exploit)

Allow suffix on LPX*.jar file name such as LPX (1).jar or LPX-3.5.2.jar

Adjusted default config to fix false flags

General...

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