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 Example video of how NoCheatPlus blocks cheats (outdated plugin version).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 Aug 5, 2012@bigbull89
Here the same and i also get errors from failed instantheal: tried to regenerate health faster then normal. He is trying to eat something
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Posted Aug 5, 2012I only get this message after the debug http://imgur.com/pMILC
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Posted Aug 5, 2012if u wont to help in debug mode , dl
https://dl.dropbox.com/u/34835222/debug/NoCheatPlus.jar
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Posted Aug 5, 2012re download same link
https://dl.dropbox.com/u/34835222/NoCheatPlus.jar
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Posted Aug 5, 2012with the latest nocheat+ and cb 2287, players can't build or mine, its as if it was totally laggy... Just wanted to let you know.
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Posted Aug 5, 2012@NeatMonster
Thank you :D
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Posted Aug 5, 2012Ive been getting this error from the dev build you just released.
http://pastebin.com/5YvNHB00
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Posted Aug 5, 2012Guys. If your server wasn't ready because of plugins you shouldn't have updated. The developer of NCP just came back to the plugin and is doing bug fixes from 1.2.5 and is trying his best to get it up soon.
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Posted Aug 5, 2012http://imgur.com/a/J3Q8X This Is Happening To Alot Of People I Know And Its Spamming like mad even know theses people arnt hacking.
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Posted Aug 5, 2012@NeatMonster
Thank you so much <3
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Posted Aug 5, 2012@NeatMonster
:D
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Posted Aug 5, 2012@NeatMonster
<3
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Posted Aug 5, 2012Latest development build: https:dl.dropbox.com/u/34835222/NoCheatPlus.jar.
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Posted Aug 5, 2012@NeatMonster
Neatmonster: here are a few timings from version 3.6.1 - http://pastie.org/4395611 - Would love if you could improve some performance; espcially regarding player login/join events, which are unreal.
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Posted Aug 5, 2012nice, keep going !!!!!!!!!!!!!!!!!!!
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Posted Aug 5, 2012@mercywarfare
He just said hes returned; and im sure has a ton to catch up on. Give him a few days please... theres no RB even out currently.
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Posted Aug 5, 2012@mercywarfare
NoCheatPlus is currently updating, check here: https://join.me/989-274-049
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Posted Aug 5, 2012Dude! Please push out a update >.<
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Posted Aug 5, 2012@NeatMonster
Truly great news! Expect serious donations coming your way :) Already donated once back in the day; shall send you more soon! Thank you very much for this :P As well thanks asofold for providing support/help while NeatMonster was away.
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Posted Aug 5, 2012@ShakyTom
Oh, i put donation buttons to all my projects, examples Archer , PlayersInCubes :) - not that i would expect any ...