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 Example video of how NoCheatPlus blocks cheats (outdated plugin version).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).
Comments
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_ForgeUser9668734 Owner
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_ForgeUser15078623 Ticket Manager
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_ForgeUser16101223 Contributor
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_ForgeUser7091862 Former Author
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_ForgeUser7459264 Former Author
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Forge_User_61842651 Author
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MyPicturesCP Artist
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Posted Sep 29, 2012@asofold
I wish there was a console entry, but there isn't :/
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Posted Sep 29, 2012@Destroyer_xI
Need more information, if it is NCP kicking you can be sure there will be a logging entry either on the console or in the nocheatplus.log for which check kicked them or which check alerted before kicking.
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Posted Sep 29, 2012@asofold
Okay that solves the nuker thing, Thankyou.
Since updating to 3.7.3 users have been randomly kicked, reason 'booted from server'
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Posted Sep 29, 2012@Destroyer_xI
You can set actions to do banning.
However in order to ban "them" you need to identify "them" and you have to count in possible client and server side lag, as well as possible bugs or false positives.
Currently nukers are prevented by combination of several checks, the most reliable one might be the frequency check in terms of having the lowest potential for bugs and false positives while alerting most often for nukers. So testing out what values those reach for nuker use might lead to a reasonable ban level.
Still i think the current version does prevent almost as much of nuking as one can prevent without penalizing normal game play. So what a nuker-user can do is break a couple of blocks at once until the frequency and fastbreak checks prevent further breaking for a while. The more careless nuker implementations might even fail for WrongBlock and direction checks. So what can they do... not much more than ordinary players.
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Posted Sep 29, 2012@asofold
Is there no way to just ban them straight away?
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Posted Sep 29, 2012@asofold
I'll try that now, Thanks.
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Posted Sep 29, 2012@Destroyer_xI
Oh yes that helps a lot - you have NCP version 3.6.1 installed you should download the latest version for MC 1.3.1, i.e. NoCheatPlus 3.7.3-b111
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Posted Sep 29, 2012@asofold
Might this help:
http://pastebin.com/AFYNTFiU
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Posted Sep 29, 2012@asofold
I'm using Vault, Citizens, WG, WE.. etc. I've used nuker myself, it was anything else it would rollback. And I saw the guy do it.. I have no idea why it works, it shouldn't do.
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Posted Sep 29, 2012@Destroyer_xI
Using Spout + cncp ? (if so, try to disable the player-class hook or remove either Spout or cncp to see if that blocks it).
It is very unlikely that any serious nuking work. What could be is that with a high efficiency tool a player can break like 20 blocks per second, but not more than a normal player could do anyway.
Otherwise it is very likely to be some plugin incompatibility, or NCP not being enabled at all or so.
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Posted Sep 29, 2012CB 1.3.1, R2
NCP 3.7.3 b111.
Yes, I was just flying around my server minding my own business when I saw chunks of land disappearing from around a guest. He says 'lolol nuker works trolol' and I ban him. Obviously you cant rollback nuker....
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Posted Sep 29, 2012@Destroyer_xI
Very unlikely... which version CraftBukkit and NCP are you using ?
Is it NCP 3.7.3-b111 ?
It might be that nuker displays, but it can't break blocks faster than normal - or you have been testing wiht bypass permissions (or op).
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Posted Sep 29, 2012I'm using the latest version, yet nuker works.
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Posted Sep 29, 2012@Destroyer_xI
Be sure to use the correct version of NCP for your CraftBukkit version.
For CB with 1.3.1 / 1.3.2 use NCP 3.7.3-b111 or up.
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Posted Sep 29, 2012I install this thinking it will work, sure, it does.. but I still get people using nodus' nuker on my server. Any plans to tackle this, or do I look elsewhere?
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Posted Sep 29, 2012@Stets12
Please state your CraftBukkit version and the build number of NoCheatPlus (full version).
Also please post the full stacktrace for the error.
Best make a ticket filling in the information (use a paste link for the error, preferably).
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Posted Sep 29, 2012I tried it out without being op but nothing happened in console or game and i did find this while starting server [SEVERE] Error occurred while enabling NoCheatPlus 3.7.3 (Is it up to date?)
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Posted Sep 29, 2012oh ok, thanks anyway :)
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Posted Sep 29, 2012@asofold
Always a fight with you when I answer to a comment/ticket :) But you still win the most rounds... lol
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Posted Sep 29, 2012@bigggan
That is CraftBukkit !
you might try to use a speed setting plugin (cncp + set-speed hook just careful with Spout then, or Essentials with the /speed command, possibly other).