NoCheatPlus
Detect and fight the exploitation of various flaws/bugs in Minecraft!
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 Example video of how NoCheatPlus blocks cheats (outdated plugin version).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.
Recommended
The following plugins might be useful to have a look at.
ProtocolLib
Allows NoCheatPlus to activate packet-level checks, covering a range of exploits that can't be monitored using ordinary means. Since roughly Minecraft 1.7.10, the fight.speed check can't work as expected anymore, due to changes in CraftBukkit. With ProtocolLib this can be repaired.
CompatNoCheatPlus (cncp)
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
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_ForgeUser9668734 Owner
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_ForgeUser15078623 Ticket Manager
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_ForgeUser16101223 Contributor
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_ForgeUser7091862 Former Author
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_ForgeUser7459264 Former Author
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Forge_User_61842651 Author
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MyPicturesCP Artist
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Posted Sep 18, 2012@LordKainzo
thats the defaults ones, I dont change them, nor idk how to.
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Posted Sep 18, 2012Lol??
17:52:09 [SEVERE] Could not pass event PlayerDeathEvent to NoCheatPlus
org.bukkit.event.EventException
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:341)
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:477)
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:462)
at org.bukkit.craftbukkit.event.CraftEventFactory.callPlayerDeathEvent(CraftEventFactory.java:322)
at net.minecraft.server.EntityPlayer.die(EntityPlayer.java:307)
at net.minecraft.server.EntityLiving.damageEntity(EntityLiving.java:663)
at net.minecraft.server.EntityHuman.damageEntity(EntityHuman.java:595)
at net.minecraft.server.EntityPlayer.damageEntity(EntityPlayer.java:349)
at net.minecraft.server.EntityLiving.a(EntityLiving.java:845)
at net.minecraft.server.EntityHuman.a(EntityHuman.java:1145)
at net.minecraft.server.Entity.a(Entity.java:736)
at net.minecraft.server.EntityPlayer.b(EntityPlayer.java:465)
at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:423)
at net.minecraft.server.Packet10Flying.handle(SourceFile:136)
at net.minecraft.server.NetworkManager.b(NetworkManager.java:282)
at net.minecraft.server.NetServerHandler.d(NetServerHandler.java:109)
at net.minecraft.server.ServerConnection.b(SourceFile:35)
at net.minecraft.server.DedicatedServerConnection.b(SourceFile:30)
at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:578)
at net.minecraft.server.DedicatedServer.q(DedicatedServer.java:213)
at net.minecraft.server.MinecraftServer.p(MinecraftServer.java:474)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:406)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:539)
Caused by: java.lang.IllegalAccessError: tried to access class fr.neatmonster.nocheatplus.checks.fight.GodMode$1 from class fr.neatmonster.nocheatplus.checks.fight.GodMode
at fr.neatmonster.nocheatplus.checks.fight.GodMode.death(GodMode.java:106)
at fr.neatmonster.nocheatplus.checks.fight.FightListener.onEntityDeathEvent(FightListener.java:202)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:339)
... 23 more
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Posted Sep 18, 2012@TNTUP
It means the checks are too harsh, reduce the violation level.
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Posted Sep 18, 2012The most common NCP warnings I get is fastbreak, nofall and instantheal. I ask to who and they say idk what is it, I never modded/hack a thing.... I see them even on trustful members, idk if its my server doing that :/
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Posted Sep 18, 2012Having a hard time adjusting the fastbreak stuff. Here's my current settings @Asofold - here's some of the checks failing - we can have a pretty laggy server at times so I'd like to give everyone a little leeway on the checks here so it doesn't trigger so often.
fastbreak: active: true delay: 60 intervalsurvival: 80 actions: cancel vl>400 log:fastbreak:3:5:f cancel buffer: 3 interval: 100
12.09.17 01:13:22 [INFO] Kainzo failed FastBreak: tried to break too many blocks. VL 386.
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Posted Sep 18, 2012@Psithief
Build number of NCP and configuration please...
that should be a singular case rather, it is running on thousands of servers (in very different versions).
Does that happen to all players ?
The survivalfly message is indeed strange, but nofall can be a cheat simply. so we need more details to judge it. Probably pm a plugin list too. (If using cncp we need the version too).
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Posted Sep 18, 2012What is with these retarded fly-checks killing all my players? Is there some bizarre incompatibility that nobody talks about? Is NCP not compatible with CraftBukkit build 2365?
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Posted Sep 18, 2012@Malvagio87
@fazaro
Yes, CompatNoCheatPlus is needed to make NPCs form Citizens or mcMMO skils compatible with NoCheatPlus, so if you use NoCheatPlus and one of the other plugins, you should consider also using CompatNoCheatPlus. If You don't use NoCheatPlus, then you would'nt use cncp either.
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Posted Sep 18, 2012@Malvagio87
you can use both
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Posted Sep 18, 2012if you use CompatNCP do you have to also use NCP or is it just one or the other?
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Posted Sep 18, 2012@ablac
Looks like a damaged download, are you sure you downloaded 3.7.1-beta or 3.7.2-beta ?
And don't let jars of of old versions of plugins be in the servers or plugins directory (just in case).
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Posted Sep 17, 2012New version throws an error every time A player moves Spamms the console :/ The old version for me was causing crashes when rebooting the server it wouldnt boot cause NCP. And now the new version spams my console with
That pops up about 30 times for every player as they walk through a block, and about 8 times everytime a player joins.
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Posted Sep 17, 2012Instanteat seems to be going off like crazy on my server. I'm using the latest builds and people are constantly complaining. Not sure if it's a bug but figured i'd let you guys know and if anyone else mentions it you can maybe look into it.
Let me know if you need any data etc.
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Posted Sep 17, 2012@Maxetto
I and @NeatMonster had a talk about the NC+ server and we decided to drop it because he has not enough time anymore to manager him. I and @asofold will move it to a supported server from @ipzent <
Thanks man.About the donations: Since @NeatMonster will step back from the NC+ development he will use it for the coming minecon in Paris. But I'm nut sure, I try to meet him again and have a talk about that, not really sure what he is planing now since I didn't talk with him a week ago now..
But don't worry I and @asofold will still maintain NC+ for you all, Jenkins will be ready also soon for funky dev builds to test with. Find as much bugs as you can! BETA is already out now the RC of NC+ is coming so every good ticket will make it better ;).
@chris_king
You do not need to check your server for bad plugins (backdoor, hacking,...). Just install all your plugins from dev.bukkit and you should be save to go.
That plugin he talks about is probably a modded plugin that lets all users do OP commands like /stop /ban /kick /give, .... So don't listen to him and only install on your server what you think is save to use on it.
@Intangir
Yea really sorry about that, the updater was bleeding in the 3.7 versions. And when our server got killed it died with it, just use the latest BETA build and you should be good to go.
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Posted Sep 17, 2012@syamn
That's very strange, because that does not seem to be the content of current NoCheatPlus source code, where did you download that version?
Could it be that you have the jar of an older NCP version somewhere on your servers directories (probably accidentally uploaded once)?
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Posted Sep 17, 2012@Intangir
They said you must use the lastest beta build or it will do that.
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Posted Sep 17, 2012nocheatplus is stopping my server from even starting all of a sudden... it completely stops responding after enabling nocheatplus
i remoevd it and now it starts again....
geez man this mod takes down my whole server and causes more losses than any other mod i have
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Posted Sep 17, 2012I have NPE while enabling latest version:
08:19:44 [INFO] [NoCheatPlus] Enabling NoCheatPlus v3.7.1-beta-b95
08:19:44 [SEVERE] java.lang.NullPointerException
08:19:44 [SEVERE] at fr.neatmonster.nocheatplus.config.ConfigManager.writeInstructions(ConfigManager.java:234)
08:19:44 [SEVERE] at fr.neatmonster.nocheatplus.NoCheatPlus.onEnable(NoCheatPlus.java:96)
08:19:44 [SEVERE] at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:217)
(...cont)
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Posted Sep 17, 2012@LordKainzo
Are they jumping? If that's the problem your having then same here =/
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Posted Sep 17, 2012@asofold
Latest dev build of NCP (Build 95) not allowing me bypass to CJB xray with * permission.