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 Example video of how NoCheatPlus blocks cheats (outdated plugin version).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).
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Posted Dec 21, 2012@Ta6akus4
same...
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Posted Dec 21, 2012@asofold How long? 10 minutes? and thanks.
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Posted Dec 21, 2012Thanks!
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Posted Dec 21, 2012I will update (NO GUARANTEES).
But sincerely, since the new safeguard-change people seem to expect us to update even faster. It is like 9:17 am here and the FIRST dev build of CraftBukkit is hardly 16 hours old, am i wrong?
Updates will be on Jenkins (soon) until i have the impression that CB stays stable enough and they have a version tag for an upload on BukkitDev.
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Posted Dec 20, 2012Hey guys, Thanks for all the hard work and yet another Update release from Mojang. Happy Holidays to all.
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Posted Dec 20, 2012@ProMCer
NoCheatPlus will break now on every Minecraft update that comes out since bukkit decided to go this way now. More HERE.
You will have to wait for a 1.4.6 NoCheatPlus build now.
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Posted Dec 20, 20121:51:09 [SEVERE] Error occurred while enabling NoCheatPlus v3.8.7-b287 (Is it up to date?) java.lang.ExceptionInInitializerError at fr.neatmonster.nocheatplus.NoCheatPlus.onEnable(NoCheatPlus.java:434) at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:217) at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:457) at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:381) at org.bukkit.craftbukkit.v1_4_6.CraftServer.loadPlugin(CraftServer.java:278) at org.bukkit.craftbukkit.v1_4_6.CraftServer.enablePlugins(CraftServer.java:260) at net.minecraft.server.v1_4_6.MinecraftServer.j(MinecraftServer.java:321) at net.minecraft.server.v1_4_6.MinecraftServer.e(MinecraftServer.java:300) at net.minecraft.server.v1_4_6.MinecraftServer.a(MinecraftServer.java:259) at net.minecraft.server.v1_4_6.DedicatedServer.init(DedicatedServer.java:149) at net.minecraft.server.v1_4_6.MinecraftServer.run(MinecraftServer.java:399) at net.minecraft.server.v1_4_6.ThreadServerApplication.run(SourceFile:849) Caused by: java.lang.RuntimeException: Could not set up access to Minecraft API. at fr.neatmonster.nocheatplus.compat.MCAccessFactory.getMCAccess(MCAccessFactory.java:28) at fr.neatmonster.nocheatplus.NoCheatPlus.initMCAccess(NoCheatPlus.java:105) at fr.neatmonster.nocheatplus.NoCheatPlus.getMCAccess(NoCheatPlus.java:98) at fr.neatmonster.nocheatplus.utilities.BlockProperties.<clinit>(BlockProperties.java:247) ... 12 more The latest version on NCP is showing me this error on 1.4.6 development build. Hope they can fix this very soon, thank you
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Posted Dec 20, 20121.4.6 update, would be cool >when you get around to it<, thanks in advance.
GJ so far though =)
No pressure from me, just wanted to say stuff =p
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Posted Dec 20, 2012Cant believe how many people are demanding a 1.4.6 instead of patiently waiting on it. Instead I'd like to say thank you to the developers of NCP for your continued dedication to this project! Have sent off a donation your way as well! Happy Holidays and take your time :)
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Posted Dec 20, 2012@iTristan
I didn't say AntiCheat doesn't work with 1.4.6. I said that its not compiled against 1.4.6 yet. I'm sure @asofold will update NoCheatPlus as soon as possible but that will take a bit of time of course.
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Posted Dec 20, 2012@MyPictures
AntiCheat Works flawlessly on 1.4.6, I use it since NC+ isn't working.
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Posted Dec 20, 2012@Ta6akus4
I didn't force anyone here to stay on 1.4.5 I just recommend it because using CB development builds on new Minecraft update could corrupt/destroy things on your server. We cant immediately push a NoCheatPlus build out that works with Craftbukkit 1.4.6, @asofold has also a life so give him some time please.
To note: AntiCheat is also not compiled/coded with 1.4.6 yet.
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Posted Dec 20, 2012@Ta6akus4
A bit more respect would be sonething you can at least give him, you know how hard it actualy is to code?
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Posted Dec 20, 2012@AeroNetwork
Because NoCheatPlus uses other MCAccess methods then AntiCheat does. It will now break on every Minecraft update caused by this commit.
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Posted Dec 20, 2012@MyPictures
AntiCheat works..why doesn't nocheatplus work?
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Posted Dec 20, 2012It will take some time for us to update NoCheatPlus to the new 1.4.6 build of Craftbukkit. So please stay on 1.4.5 since its not smart to use one of the first development CB builds on a new Minecraft update.
@Blackixx
Ok. Thanks :)
@tiwar
Glad someone understands that :). Thanks
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Posted Dec 20, 2012guys,come on..it's just been released Oo give it some time..and remember demanding attitude only pisses people off =P
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Posted Dec 20, 2012Very please update to 1.4.6 :)
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Posted Dec 20, 2012UPDATE NO CHEAT PLUS TO 1.4.6!!!
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Posted Dec 20, 2012@MyPictures
Thanks.