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 Example video of how NoCheatPlus blocks cheats (outdated plugin version).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 2, 2012Well, I had updated my server with the latest dev build that was released today, come to find out, people were flying around on my server, so i tested nocheat+ myself, and it was no longer working. I was going to use Anticheat, but I've been told by other server owners that it's not good.
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Posted Aug 1, 2012How can i do so some rank can bypass this plugin?
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Posted Aug 1, 2012@zSwayz
I highly doubt it will be compatible due to the new client logic and changes in 1.3.
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Posted Aug 1, 2012@pkt77
That is now a very special way to interpret how Orebfuscator is working.
You players will see (approximately) what they would see without cheating, unless they cheat.
There may be effects depending on lag and configuration of Orebfuscator, but still it has nothing to do with trolling players.
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Posted Aug 1, 2012@javoris767
Great :)
Hope you will use last dev and try improve performance issues before adding stuff.
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Posted Aug 1, 2012will this be compatible with 1.3 or do i have to go find a new plugin? .-.
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Posted Aug 1, 2012I HAVE to know if this will be updated to 1.3 by the time bukkit releases it.
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Posted Aug 1, 2012I think NoCheatPlus should also have x-ray hack alerts when a play finds specific ores, because orebfuscator sends false textures to the client when a player is NOT using x-ray. So I recomend that noone uses this unless u r a troll and want to piss off ur players
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Posted Aug 1, 2012@Mayhem777
It is compatible
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Posted Aug 1, 2012Please made it compatible for R5 :(
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Posted Aug 1, 2012@javoris767
Hi that would be awesome, please contact the staff members that still want to work together with you though, ;) or at least, the members that have been serving a lot of work here. ;)
Like MyPictures for example ;) But also the other developer of Anticheat, is interested. So maybe you can work together with him. Also please note that the latest unfinished dev version of Nocheatplus is out there, it is here:
https://github.com/NeatMonster/NoCheatPlus_dev
Please take this with you before you start, ;)
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Posted Jul 31, 2012Ok guys. I shall take over this project for a bit as SupaNoCheat. Everything will be the same in the first release, but the second I will start the requests and additions to it. After that I will assemble a team for this project. http://dev.bukkit.org/server-mods/supanocheat/
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Posted Jul 31, 2012Best wishes NeatMonster!
Please consider a small donation for all the hard work that went into this fork to keep our servers as safe as possible!
Better then Notch/Mojang EVER has.
Thank you to the entire team of NCP, gone but fondly remembered.
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Posted Jul 31, 2012@Folas1337
I don't like Anticheat tbh. Someone needs to take over this project. :/
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Posted Jul 30, 2012@kustomcraft
AntiCheat-author just replied. He's gonna try to work stuff from NoCheatPlus into AntiCheat and talk with "NeatMonster" about it. Just give him time to come back to his country and he'll be working on it as much as he can. But sadly NoCheatPlus is now down, too :(
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Posted Jul 30, 2012Great, new it would come to a end, just like the original plugin :/ now most servers will be able to be bypassed with the new clients coming up in 1.3 unless someone could over take this project.
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Posted Jul 29, 2012This is sad news :/
Really hope someone would take over the project because bukkit really can't without nocheat.
I also agree with UnitedFactions he should really put the last dev version source online since he already fixed a lot stuff.
Else it would be double work if someone would even continue.
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Posted Jul 29, 2012Looking forward to 1.3, it might lower the severity of the hole this plugin leaves when it dies...
However, private is private and I totally understand priorities. My best wishes to NeatMonster and kudos to what you created :)
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Posted Jul 29, 2012@Juliui
Sorry to hear that Juliui...
@Luxius96
If you need a update and think that it is easy to do, then feel free to update this plugin ;)
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Posted Jul 29, 2012@Juliui
Why? omg!!??? this plugin dont check the forcefield of nodus client! with no update this plugin all server of minecraft = destroyed! PLEASE UPDATE :((