NoCheatPlus

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NoCheatPlus

Detect and fight the exploitation of various flaws/bugs in Minecraft!

Minecraft 1.11.2 and latest features are currently only available on Jenkins - once things stabilize, stable builds will be available here again.

Introduction

NoCheatPlus attempts to prevent cheat clients from exploiting weaknesses of Minecraft or its protocol, making your server more safe. Checks cover a wide range of issues including flying and speeding, fighting hacks, fast block breaking and nukers, inventory hacks, chat spam and other types of malicious behaviour. For a more complete list have a look at the Features Page.

NoCheatPlus puts emphasis on configurability and allows you to customize actions that are carried out when a player fails a check (e.g. silent cancelling, executing commands, just logging). Bypass permissions allow to control what check to apply for which players, all checks can be deactivated in the configuration, also having the option for world-specific configuration files. Many checks allow more detailed configuration to adjust sensitivity.

Certainly NoCheatPlus is not a magical bullet, it uses a lot of heuristics and even guessing, so you will encounter false positives here and there and also not catch every single violation. Example video of how NoCheatPlus blocks cheats (outdated plugin version).

NoCheatPlus was introduced by NeatMonster, building on the code base of NoCheat by Evenprime.

Make plugins like mcMMO or MachinaCraft more compatbile with NoCheatPlus. Not all existing plugins are covered (yet), but you can leave a note or create an issue/ticket request for cncp. Phasing out: Citizens 2 should work with NCP out of the box, MagicSpells are working on compatibility too - rest will be integrated into NCP.

Orebfuscator

Orebfuscator fights all sorts of X-ray-hacks by altering the map information that is sent to the players, such that they have to mine blocks to actually reveal what is behind. Virtually a "must have". (Latest versions of Spigot contain features of Orebfuscator.)

Downloads and History of Changes

Download officially approved versions on the Files page at BukkitDev.
Development builds have been moved over to the Jenkins at md-5.net.
Do not download from any other source, do not use jars other people send you.
Change lists: Wiki (digest) | Jenkins (by build number) | GitHub (all commits).
Source code
~~Plugin statistics are no longer reported to mcstats.org~~.

Support

Documentation Resources

Consider first: Frequently asked Questions and Known Issues.
Wiki (Configuration, Permissions, Commands)
Developers might have a look at the page describing the API of NoCheatPlus.

Contact us

Quick questions can be asked on this page,
or on IRC (Server: irc.spi.gt | Default-Port: 6667 | SSL-Port: 6697 | Channel: #nocheat | Web client: WebIRC)
For real issues or feature requests please create a new issue/ticket or add to an existing issue/ticket.
To send information that is not to be seen by all, you can also reach us by PM to @asofold and @MyPictures. @IceAP (IRC: ICE) will also help or redirect the conversation. Please do not contact the user 'NoCheatPlus', it is for administrative purposes only and will likely not be answered in time. Keep to BukkitDev and GitHub for support, do not trust users on other forums or websites, also not if their nick names are the same as NCP staff on BukkitDev.

Please always state the output of the "ncp version" command to let us know versions in use (users of cncp also the "cncp" command).

Comments

_ForgeUser8573327
- Join Date: 3/12/2012
- Posts: 159
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#4099 _ForgeUser8573327

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Posted Feb 5, 2013
@MyPictures

1.4.7 recomended and the current NCP 3.8.9-b353.

I also use CNCP.

I have 2 players admitting to using Nodus after i found his tunnels dug straight to Diamond ore

Last edited by _ForgeUser8573327: Feb 5, 2013

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MyPicturesCP
- Join Date: 10/30/2011
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#4098 MyPicturesCP

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Posted Feb 5, 2013
@BBFChaser

What means "up to date" for you? Please give us CB and NC+ version. For Craftbukkit 1.4.7 you need at least this build or higher: http://dev.bukkit.org/server-mods/nocheatplus/files/44-nocheat-plus-3-8-9-b353/

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_ForgeUser8573327
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#4097 _ForgeUser8573327

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Posted Feb 5, 2013
I am using this and its up to date yet have had hackers using Nodus does this not block it?

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MyPicturesCP
- Join Date: 10/30/2011
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#4096 MyPicturesCP

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Posted Feb 5, 2013
@xclucky

Please update your NoCheatPlus version to at least 353 or higher. That might fix your issue. If not then create a new ticket for us please.

@Waterworth12

Do you you or the affected player use any armor that is enchanted with the new "Thorns" enchantment? Sounds really strange... You should try out one from the bleeding builds that are available on our Jenkins page. If it still happens then feel free to open a new ticket so we can keep track of this issue.

@accmss

Mods such as InventoryTweaks or any other InvenotryManagerMods give those players who use that kind of mod a advantage compared to other players that play with full vanilla Minecraft. We wont remove any warning by default but our config file allow you to tweak NC+ so it fits your likings. If you want players to allow the use of InventoryManager mods then I recommend to disable the FastClick check in the configuration file (careful! By disabling this check you allow players/hackers to use ChestStealer and other cheats!).

More about configs here: http://dev.bukkit.org/server-mods/nocheatplus/pages/documentation/configuration/

P.S I don't recommend banning on only what NC+ says, its not always 100% right and sometimes false positives can pop up (mostly because of lag...).

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_ForgeUser10414045
- Join Date: 1/19/2013
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#4095 _ForgeUser10414045

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Posted Feb 5, 2013
Could you disable these warning by default. I banned a player for sorting his inventory.

xxxPlayerxxx failed FastClick: tried to move items in his inventory too quickly. VL 490.

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_ForgeUser7516642
- Join Date: 9/8/2011
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#4094 _ForgeUser7516642

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Posted Feb 5, 2013
@asofold

Latest NCP Version

http://dev.bukkit.org/server-mods/nocheatplus/files/44-nocheat-plus-3-8-9-b353/

Latest Bukkit version

http://dl.bukkit.org/downloads/craftbukkit/view/01845_1.4.7-R1.0/

Warnings include:

moving.survivalfly VL 457 blockbreaking.noswing VL 29 flight.reach VL 3 flight.knockback VL 50 moving.passable VL 1

- All of which were warns on my Alt account, without any modifications to my client normal player permissions.

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Forge_User_61842651
- Join Date: 8/29/2011
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#4093 Forge_User_61842651

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Posted Feb 5, 2013
@Waterworth12

Which version of NCP are you using? Which CraftBukkit version?

Does this always happen or often or rarely?

Can you be more specific about getting pulled into the ground? What alerts does NCP generate?What does "/ncp info PLAYER" show for a player who suffered this? (Would be best if you start with "ncp remove PLAYER" before testing this, to be able to compare, all in case you can actually reproduce it on your server.)

In my tests i did not get pulled anywhere but air, but the side conditions may be important here.

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_ForgeUser7516642
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#4092 _ForgeUser7516642

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Posted Feb 4, 2013
Using latest build, when Zombies,Spiders or Mobs holding a knock back sword hit you, you are pulled back and begin to sink into the ground for awhile. Seems some check is too strict or there is a bug, please take a look.

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Forge_User_61842651
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#4091 Forge_User_61842651

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Posted Feb 4, 2013
@lenis0012

It will be more difficult to do that in the next release, but certainly a strong knockback essentially is like a little bit of flying, in future we might try to confine it more and more, but due to latency things are not exactly straight forward on velocity.

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lenis0012
- Location: Krimpen
- Join Date: 2/11/2012
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#4090 lenis0012

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Posted Feb 4, 2013
somebody said this in the comments of one of my plugins:

I heard bout a way to "cheat" the NoCheat plugin, if you get attacked with a sword with knockback, you activate your flyhack before hit the ground then you can fly for 4-10 secconds. If possible, can you fix this? (or if it is a real bug)

It should basicly ignore fly hacking when a sword has knockback.

Last edited by lenis0012: Feb 4, 2013

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Forge_User_61842651
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#4089 Forge_User_61842651

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Posted Feb 4, 2013
@ViscousSummer88

Seems some builds were deleted, a new one is available right now.

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_ForgeUser7825448
- Join Date: 11/7/2011
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#4088 _ForgeUser7825448

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Posted Feb 4, 2013
@MyPictures

I am using NCP version 3.8.9-b327 and Craftbukkit 1.4.7-R1.0. I also noticed this happening on 1.4.6... I'm wondering if there is some new type of hack out there that breaks a block without actually breaking the block...

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_ForgeUser8086127
- Join Date: 12/16/2011
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#4087 _ForgeUser8086127

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Posted Feb 4, 2013
Need to be running a latest DEV build of NCP, but Jenkins has no uploads in it.. is there an alternative link?

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Forge_User_61842651
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#4086 Forge_User_61842651

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Posted Feb 4, 2013
@datacrypt

Which version of NCP are you using? What exactly do players do and when exactly do they suffer those set-backs?

Jumping off the blocks edge, during falling...?

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xVirusXx
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#4085 xVirusXx

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Posted Feb 3, 2013
Anyone know some good tweaks for the senitivity? Seems a lot of people are getting false positive readings. i.e. Jumping off of a player made diving board and getting "survival fly" detection's.

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MyPicturesCP
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#4084 MyPicturesCP

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Posted Feb 3, 2013
@RSGTechno

That's a part of the SurvivalFly check. VClip is basically teleporting/moving up or down. So its already covered :)

@xclucky

Whats your Craftbukkit and NoCheatPlus version? Please be sure that you at least this version (or higher) for Craftbukkit 1.4.7 R1.0: http://dev.bukkit.org/server-mods/nocheatplus/files/44-nocheat-plus-3-8-9-b353/

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_ForgeUser7825448

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#4083 Posted Feb 3, 2013

Is there a hack to break signs? This has happened countless times where a sign is randomly broken and no logblock data is there for it. I've noticed this in worldguard regions, residences and griefprevention regions... It is getting very annoying >.>

Also, I just got a big error when a player attempted to fly:

2013-02-03 18:16:25 [SEVERE] org.bukkit.event.EventException: GenericListener<org.bukkit.event.block.BlockBreakEvent> @LOWEST encountered an exception for fr.neatmonster.nocheatplus.checks.blockbreak.BlockBreakListener with method public void fr.neatmonster.nocheatplus.checks.blockbreak.BlockBreakListener.onBlockBreak(org.bukkit.event.block.BlockBreakEvent)
	at fr.neatmonster.nocheatplus.event.GenericListener.onError(GenericListener.java:117)
	at fr.neatmonster.nocheatplus.event.GenericListener.execute(GenericListener.java:108)
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
	at org.bukkit.plugin.TimedRegisteredListener.callEvent(TimedRegisteredListener.java:35)
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:477)
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:462)
	at net.minecraft.server.v1_4_R1.PlayerInteractManager.breakBlock(PlayerInteractManager.java:282)
	at net.minecraft.server.v1_4_R1.PlayerInteractManager.a(PlayerInteractManager.java:209)
	at net.minecraft.server.v1_4_R1.PlayerConnection.a(PlayerConnection.java:567)
	at net.minecraft.server.v1_4_R1.Packet14BlockDig.handle(SourceFile:46)
	at net.minecraft.server.v1_4_R1.Packet14BlockDig$$EnhancerByCGLIB$$c01219dc.CGLIB$handle$0(<generated>)
	at net.minecraft.server.v1_4_R1.Packet14BlockDig$$EnhancerByCGLIB$$c01219dc$$FastClassByCGLIB$$f315a6a2.invoke(<generated>)
	at com.comphenix.net.sf.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228)
	at com.comphenix.protocol.injector.ReadPacketModifier.intercept(ReadPacketModifier.java:109)
	at net.minecraft.server.v1_4_R1.Packet14BlockDig$$EnhancerByCGLIB$$c01219dc.handle(<generated>)
	at net.minecraft.server.v1_4_R1.NetworkManager.b(NetworkManager.java:290)
	at net.minecraft.server.v1_4_R1.PlayerConnection.d(PlayerConnection.java:113)
	at net.minecraft.server.v1_4_R1.ServerConnection.b(SourceFile:39)
	at net.minecraft.server.v1_4_R1.DedicatedServerConnection.b(SourceFile:30)
	at net.minecraft.server.v1_4_R1.MinecraftServer.r(MinecraftServer.java:598)
	at net.minecraft.server.v1_4_R1.DedicatedServer.r(DedicatedServer.java:224)
	at net.minecraft.server.v1_4_R1.MinecraftServer.q(MinecraftServer.java:494)
	at net.minecraft.server.v1_4_R1.MinecraftServer.run(MinecraftServer.java:427)
	at net.minecraft.server.v1_4_R1.ThreadServerApplication.run(SourceFile:849)
Caused by: java.lang.reflect.InvocationTargetException
	at sun.reflect.GeneratedMethodAccessor156.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:601)
	at fr.neatmonster.nocheatplus.event.GenericListener.execute(GenericListener.java:105)
	... 22 more
Caused by: java.lang.ArrayIndexOutOfBoundsException: -721554504
	at fr.neatmonster.nocheatplus.utilities.TickTask.getLag(TickTask.java:239)
	at fr.neatmonster.nocheatplus.checks.blockbreak.FastBreak.check(FastBreak.java:84)
	at fr.neatmonster.nocheatplus.checks.blockbreak.BlockBreakListener.onBlockBreak(BlockBreakListener.java:123)
	... 26 more

Last edited by _ForgeUser7825448: Feb 3, 2013

_ForgeUser10331446
- Join Date: 1/4/2013
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#4082 _ForgeUser10331446

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Posted Feb 3, 2013
Add a "No Vclip" option?

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MyPicturesCP
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#4081 MyPicturesCP

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Posted Feb 3, 2013
@felixislive

Be sure you use the right versions: For now I recommend:
CraftBukkit 1.4.7 R1.0: http://dl.bukkit.org/downloads/craftbukkit/view/01845_1.4.7-R1.0/
Together with this NoCheatPlus: http://dev.bukkit.org/server-mods/nocheatplus/files/44-nocheat-plus-3-8-9-b353/ (or one from our jenkins).

Also what exactly doesn't work? Are you OP or have "*" permissions?

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_ForgeUser9972826
- Join Date: 11/13/2012
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#4080 _ForgeUser9972826

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Posted Feb 3, 2013
Doesnt work...

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Project ID

38212
Created

Apr 2, 2012
Last Released File

Jan 11, 2018
Total Downloads

1,897,258
License

GNU General Public License ver...

Bukkit

NoCheatPlus

Bukkit Plugins

NoCheatPlus

Table of Contents

Introduction

Recommended

ProtocolLib

CompatNoCheatPlus (cncp)

Orebfuscator

Downloads and History of Changes

Support

Documentation Resources

Contact us

Comments

About This Project

Categories

Members

Recent Files

Bukkit