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 Example video of how NoCheatPlus blocks cheats (outdated plugin version).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 8, 2012am unable to get a ban working for spammers
could anyone post me a working section
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Posted Aug 8, 2012Hello, I'm an op on my server with all permissions, however whenever im flying i still get teleported to ground level and all my actions are logged (saying I'm cheating), can i stop this?
For example i keep getting this
08.08 15:28:46 [Server] WARNING Tommy_Mansell moved too quickly! -0.40895101390776745,15.099231527669431,0.046622325619637195 (0.40895101390776745, 15.099231527669431, 0.046622325619637195)
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Posted Aug 8, 2012Players can't even jump and I believe I gave them the proper permissions for move. It says failed "Survival Fly" when someone tries to run and jump.
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Posted Aug 8, 2012How would you change the kick reason in this pluign?
Tried doing:
kick: kick [player] Stop hacking!
But dont seems to work.
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Posted Aug 8, 2012@mrchasez
We changed Permissions in NC+ 3.7 so please check the permissions page and your permissions.
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Posted Aug 8, 2012Just upgraded to Dev 3.7.0 Using Bukkit 1.3.1-R1.0
No one can fly, when they could with the 1.2.5 version.
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Posted Aug 8, 2012@MyPictures
ok thx thought he was stopping development, just updated. xD
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Posted Aug 8, 2012@lst96
It is updating at the moment (livestream), you can check the latest DEV build of it (Button).
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Posted Aug 8, 2012@MyPictures
is this still going to be updated?
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Posted Aug 8, 2012@clange0808
The checks are never 100% right so don't just ban if someone fails a check, sometimes its just the lag who is faking the packets.
I can not reproduce this on the nocheatplus server with the latest dev version on. Can you please explain better how you reproduced this? Maybe he used NoFall hack? Maybe it was just the lag?
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Posted Aug 8, 2012Ok well Im using the latest dev version of ncp. And running the latest RB for bukkit 1.3.1. Theirs just one thing I dont like about NoCheatPlus ( ncp ). So for example my most trusted admin ( I have been to his house he has no client/mods what so ever ) So i take him off gm and god and op. Then I tell him to jump about 30 blocks. He hits the ground then I got a warning he is using NoFall. Its just ncp is so sensitive I dont know what to believe I usaly only ban people if it says their flying/running or something because other then theat I think its just a bug. Is their any chance this could be fixed and become less sensitive?
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Posted Aug 8, 2012@TheOneWhoOwns
Not sure that is NoCheatPlus, there are issues with Vanilla/Bukkit speed/fly detection.
Make sure of the following points:
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Posted Aug 8, 2012@MasterGabeMOD
Here is a link to a video of my bug that im geting please reply as quick as possible so i can take the video down. : http://www.youtube.com/watch?v=AoxLUgVGxjw
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Posted Aug 8, 2012@mje_register
That is to ask here: CompatNoCheatPlus
I can not promise that it is possible, it strongly depends on if that plugin has an API to tell other plugins who is using that skill at a moment.
Alternatively the plugin developers could hook into the API of NoCheatPlus.
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Posted Aug 8, 2012@oskarn97
If you use Zombes mod look here: http://dev.bukkit.org/server-mods/nocheatplus/tickets/97-zombe-fly-mod/
And if not check if you have the right permissions to fly.
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Posted Aug 8, 2012@oskarn97
It's a new thing with bukkit.. It's really stupid and needs OP detection..
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Posted Aug 8, 2012@oskarn97
This might be due to lag, but try removing the plugin, then test it.
If that does not work, reply to this, and we will look into it.
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Posted Aug 8, 2012Hello!
Since I had to update, I got a problem: If a player is flying and stands still in the air he will be moved to the ground after some seconds. Can you fix this?
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Posted Aug 7, 2012@rasnyderiii
Thanks for the feedback :]
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Posted Aug 7, 2012Have you donated to NoCheatplus? You should - the best - anticheat project. Period. Thank you for the updates and Hard work.
Team Haven