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 Example video of how NoCheatPlus blocks cheats (outdated plugin version).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 25, 2012just block smart moving mod... is bad plagun for mods
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Posted Sep 24, 2012@MasterGabeMOD
That looks like you started up with NCP 3.6.1 while 3.7.3 (beta) is the newest version.
Did you auto-download it ? Might be those don't prefer the beta files...
@LiLChris06
Thanks, that is very helpful to us :)
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Posted Sep 24, 2012Thanks again for all your work, I am always running the latest dev builds.
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Posted Sep 24, 2012@asofold
Just got this error when updated
http://pastie.org/4794039
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Posted Sep 24, 2012@asofold
Build 111 will be uploaded as beta here (to be approved: NoCheatPlus 3.7.3-b111).
It will fix ender chest breaking time, have the creativefly permission also bypass survivalfly, amongs other introduce adjustments against forcefields, and a couple of optimizations.
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Posted Sep 24, 2012@Dustinduse
You might need both permissions (crativefly + survivalfly to bypass both checks - which does not make 100% sense to me, but it has been like that a long time).
That is a point that i might address soon.
@andrewkm
Yes! Now it is back to: http://www.nocheatplus.org:8080/job/NoCheatPlus/
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Posted Sep 24, 2012Has the jenkins changed again? Curious which link I should be using/have saved.
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Posted Sep 23, 2012When i give player nocheatplus.checks.moving.creativefly Perm the player is no longer allowed to fly at all. in Survival with fly plugin. or in creative... im useing Groupmanager. and i try to give this to my admins to allow them to fly faster. but it doesnt allow them to fly at all. (Also the later nocheatplus builds are working thank you) useing b105
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Posted Sep 23, 2012@asofold
I'm pretty sure it is, because my server is able to run 6 hours with 60 players at minimum of 19tps, then I restart it due to the low amount of ram, anyway... with data expiration activated, within 510 minutes my tps rate is around 15, 1 hour latter is bellow 6. but don't worry, don't take this as priority :)
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Posted Sep 23, 2012@kahlilnc
bypass permission: nocheatplus.checks.moving.survivalfly.sneaking
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Posted Sep 23, 2012NoCheatPlus blocks /sneak for players. Using AutoSneak is there a way to prevent this?
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Posted Sep 23, 2012@FurmigaHumana
I would recommend to set it to something bigger than 1 minute, because some checks might use the data for players relogging, at least like 2, 3.
I will try to check if it might cause tps drop indirectly or by bugs. are you sure it does not drop your tps if the duration is set to 0 (disabled) ?
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Posted Sep 23, 2012@asofold
This really makes no sense, but the data expiration is dropping my tps. May Be misconfigured?
I run a 60 player server, with only 2,5GB, so ANY options to save ram I'll use.
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Posted Sep 23, 2012@mbcx2
What is your CraftBukkit version number? For 1.3.x you have to use NC+ 3.7.x
@loggfreak Its already planned: http://dev.bukkit.org/server-mods/nocheatplus/tickets/100-interacting-with-chests-and-redstone-out-of-reach/
But we wont do something like Chestfix because that's easy to bypass, we will try to add something better then that.
@ha11oga11o
You should be able to disable that in the configuration file of NC+, just take a look there.
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Posted Sep 23, 2012Hello,
can someone please tell me how to turn of owner spam console. I see reds NPC: player do that, do that again, etc. How do i turn off that ?
Many thnx
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Posted Sep 23, 2012maybe something to add to your todo list: some people use freecam to interact with chest levers(to open door) etc behind walls or doors, this is a plugin that prevents that, maybe you could add that to nocheatplus http://www.youtube.com/watch?v=2Ci-FKQzJGs i have no idea why the name is chestfix but it works amazingly well
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Posted Sep 23, 2012this is for MC 1.2.5 and when i installed it, Error occurred while enabling NoCheatPlus v3.6.1 (Is it up to date?)
and the link for the dev bulids is not working
link: http://nocheatplus.org:8080/job/NoCheatPlus/lastSuccessfulBuild/artifact/target/NoCheatPlus.jar
link not working :(
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Posted Sep 23, 2012@maxwell400
NC+ uses your system time to calculate the checks and decide if its illegal or legal. If your time runs back then it will break the plugin, so be always sure that your time is running how it should be running.
We may could add something to stop that error spam from happening.
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Posted Sep 23, 2012So I got a "Time ran backwards" warning, when my system time somehow went from 1:00:01 to 00:59:23.
It was then followed by literally 50 pages of this [SEVERE] notification over and over again, in the course of a couple of seconds. http://pastie.org/4784305
Any ideas?
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Posted Sep 23, 2012@TISSIN
We just updated back to: http://www.nocheatplus.org:8080/job/NoCheatPlus/
@zwirc
Then we need more details, please make a ticket for it
@zwirc
Please continue discussion of that here: http://dev.bukkit.org/server-mods/nocheatplus/tickets/227-survivalfly-alerts-very-short-dist/
We might have a look at plugins in use or other side conditions.
@FurmigaHumana
The data expiration just removes data from logged out players - the task for that runs every minute to check, and should be implemented in a quite efficient way. What did you set the expiration interval to ? If it is 0 then it is not activated.
@chrishillz
We don't have configuration examples for hard/easy yet. For some reference on the globalchat check: Dev Pinboard/chat checks.
We will at some point redo the configuration for the chat checks to make it more simple.