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 Example video of how NoCheatPlus blocks cheats (outdated plugin version).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 9, 2014Mhm .. should I be worried about this?
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Posted Dec 7, 2014@time6628
Build 771 might fix it. Could be that we have to adjust further or that it allows too much on other efficiency tools.
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Posted Dec 5, 2014Can you fix melon blocks being broken with axes, please? On 1.8 when you try to break them it classifies it as FastBreak.
Server stats: Spigot - 1.7.9-R0.2-g03373bb MC - 1.7.10 Carbon - 1.8 NCP version - 770
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Posted Dec 5, 2014@kangarkooo
You can keep track of that issue here: http://dev.bukkit.org/bukkit-plugins/nocheatplus/tickets/813-bouncing-off-slime-blocks-1-8/
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Posted Dec 5, 2014Thanks for great work on #769 :). If you mind fixing slime blocks (getting NoFall false positives) it would be awesome. If you are already aware then ignore this
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Posted Dec 5, 2014@pielord17
Will be added soon, unfortunately build 768 still needs adaption for sprinting+strider, and the Jenkins/cloudflare seems to be inaccessible fro me right now. It'll be on soon (check foor development buiild 768 or later).
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Posted Dec 4, 2014I believe the Depth Strider enchantment is blocked by NCP.
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Posted Dec 3, 2014@DerekZil
Yeah thats a new feature in 1.8 which requires changes in CreativeFly check, you can change the speed in your NoCheatPlus configuration file under moving and then creativefly. You want to edit the Vertical and horizontal speeds here till we add support for CTRL flying.
@cillic1052
Yeah use the latest development build to add block data and shapes for MC 1.8.
@Bronzeteufel
Not tested yet but you can try to put them in your configuration file under "ignorepassable "which you find under the compatibility category of the config. This will make the passable check ignore them for now till we have a proper fix.
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Posted Dec 3, 2014@cillic1052
That just means the version you're using doesn't have the data for the 1.8 blocks. It will still work, but if a player tries to use a faster block break hack on those materials, NCP won't be able to tell. The newest successful on Jenkins seems to have the correct data.
http://ci.md-5.net/job/NoCheatPlus/
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Posted Dec 3, 2014The block breaking data is incomplete, default to allow instant breaking here is a screenshot
http://prntscr.com/5cw6kk
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Posted Dec 3, 2014Can someone confirm this bug too? http://dev.bukkit.org/bukkit-plugins/nocheatplus/tickets/820-fence-gates/
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Posted Dec 3, 2014Flying in creative while pressing 'Ctrl' to go faster causes NCP to stop you.
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Posted Dec 2, 2014@syberia97
There is a speedmine check, but it intentionally allows for some speedmine in case of lag. You can edit values in your ncp config to make this more strict, but this could result in players complaining about "block lag."
https://github.com/asofold/NCPDocs/blob/master/wiki/configuration/checks%2Fblockbreak%2Fblockbreak.creole
@xIceShotx5
Thanks for confirming this. There is a ticket (818) on this issue already, so please continue your discussion there.
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Posted Dec 2, 2014Oh, forgot to mention above, this was tested with the latest dev build on jenkins server, adn spigot 1.8. Also, disabling survivalfly check in config seemed to of fixed it, but I also don't want players flying around everywhere.
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Posted Dec 2, 2014Hi, I heard the physics of 1.8 have changed. Whenever my players are pvp'ing, and get knocked back, they tend to be teleporting back to where they were before getting knocked back. Maby the knockback of weapons changed? Not sure, but players are finding it rather irritating, just stating this incase you were unaware.
This was tested with spigot 1.8, NCP 1.8 latest dev build on jenkins.
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Posted Dec 2, 2014Plese add a anty speedmine is the most problem on my server
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Posted Dec 2, 2014@kemmeo
Ohh yea the slime trampoline isn't supported yet since it requires more changes then just block data. What do they eat? Which Spigot and NoCheatPlus version do you use?
Thanks! Feel free to report bugs using our ticket tracker, we are willing to support 1.8 servers as good as possible.
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Posted Dec 2, 2014Found 2 Bugs on my server after upgrading to Spigot 1.8 :)
1. Players Cant eat (get regen-hack error) 2. Slimeblocks bounce, but players still take falldamage (NoFall detected)
This is what I found on my public server the past 2 days, otherwise NoCheat 1.8 Just works as a Charm! Thank you guys for all your hard work! ^^
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Posted Nov 29, 2014Thanks for the quick reply and awesome plugin.
I will go get the jenkins version and check it out.
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Posted Nov 29, 2014@LordDWT
The development builds on Jenkins already implement bleeding edge support for 1.8 servers but stuff like "slime trampoline" and other "difficult to handle" 1.8 features might bug out still. However we are willing to work on 1.8 support and appreciate support from others, so feel free to jump in and create tickets for every bug you find in NC+.