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 Example video of how NoCheatPlus blocks cheats (outdated plugin version).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 Nov 20, 2012It turns out that the admin who told me the problem didn't really watch the player he just took their word for it. But if there really is a problem i will make a ticket.
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Posted Nov 20, 2012@irdoom1337
Please open a ticket for it and give more information about what actually happens (alerts, messages, what you get kicked for...).
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Posted Nov 20, 2012I have the news build from http://www.nocheatplus.org:8080/ and over have of my players can't dig, use commands, hit mobs. also it kick players when they aren't even hacking i myself was kicked 4 times for no reason.
I have craft bukkit 1.4.5 R 1.0 beta
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Posted Nov 20, 2012@masteryodaaa
For 1.4.4/1.4.5 get NCP + cncp here: http://www.nocheatplus.org:8080
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Posted Nov 20, 2012@masteryodaaa
What is /jumpto? Is that really from WorldGuard? (Cant find anything on the wiki). For mcmmo use CompatNoCheatPlus.
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Posted Nov 20, 2012Players that useworldguard /jumpto gets kicked and players that use mcmmo tree feller to help please.
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Posted Nov 19, 2012@asofold
Oh, i get it now.
Tx
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Posted Nov 18, 2012@asofold
Ah i see :D Thanks!
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Posted Nov 18, 2012@ziga808
I gave you the link already. Just read there and deactivate logging in the config. Or just do ingamechat=false.
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Posted Nov 18, 2012@asofold
Correct, it looks like Bukkit or MC built in a spamguard of their own, when users spam hotkeys - they get kicked for "reason: spam" and I'v edisabled all checks in NCP regarding chat or spamming.
https://bukkit.atlassian.net/browse/BUKKIT-2946#comment-20903
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Posted Nov 18, 2012Could jsut someone tell me where in config i DISABLE the NCP spamming thingy (it would still work but it wouldn't be spamming my screen like crazy with reports and every single thing people do) ?
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Posted Nov 18, 2012@craftovski
NCP comes with the command "ncp delay" which just delays the command comming right after it, so if you kick a player during moving (passable actions for instance) then the players position might get reset after the kick (uncertain), so to be sure the resetting of the position is happening before the kick you might use the delayed version of a commnd.
the action would include then "cmd:dealyedkick" und the strings section would contain "delayedkick: ncp delay ncp kick [player] Don't do that!" which will just delay the command "ncp kick [player] Don't do that!".
@LordKainzo
No idea, is it since 1.4.4? (Probably as @gabizou linked, i can't display it currently.)
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Posted Nov 18, 2012@ziga808
Check here: http://dev.bukkit.org/server-mods/nocheatplus/pages/configuration/#w-logging-section
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Posted Nov 18, 2012How can i turn off spamming of NCP thingy.. ?
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Posted Nov 17, 2012@LordKainzo
Are you meaning something like this: Your text to link here...?
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Posted Nov 17, 2012A lot of users are telling me they are getting "end of streams" when using macro / key bind mods - have you heard of this, @Asofold?
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Posted Nov 17, 2012@asofold
Now i understand everything in config how to customize it, thx a lot. But i just dont understand what u meant by using delay kick to make sure to not interfere with setting back of the players location, so if u can explain that lil more or give an example i would appreciate it ^^
Tx.
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Posted Nov 17, 2012@craftovski
Did you turn off logging, or reduce it ?
It is the actions entries. Those take effect on violations. So you would append something like "vl>100 cancel cmd:kick vl>300 cancel cmd:ban" (mind corrections), having the command text declared in the strings section, though i would recommend not to actually ban but using something like kicking for some time "ncp tempkick [player] 20 You're not intended to move into blocks!". Also to be sure to not interfere with the setting back of the players location one might use "ncp delay kick [player]".
@craftovski
The tab completion thingy is a bit peculiar, in fact all the help topics and tab completion is a big hole because they check all the permissions each time, which makes it very heavy. But for command tab completion Bukkit/CB does not have built in a means of controlling that. As far as i know Spigot just removed the tab completion thingy, but i am not sure what Spigot does otherwise right now.
@Puremin0rez
The most efficient way is still to disable the checks in the config, because that gets checked first and is the fastest check. Otherwise exemptions are similar.
@Zilacon
Does NCP start up at all? Check your server log please, we can not judge this without a startup log. Do oyu have the permissions to use the commands ? If not it will state "unknown command"...
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Posted Nov 16, 2012NoCheatPlus + CompatNoCheatPlus installed and when i type /nocheatplus (anything) i get a Unknown Command error.
Running:
Java 7 64 bit
Linux Centos 6.3 64 Bit
Bukkit 1.4.5
Help please!
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Posted Nov 16, 2012Does making a player exempt from a check do the same thing as disabling a check pretty much?
I like to disable checks via permissions because I reset my config alot.