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 Example video of how NoCheatPlus blocks cheats (outdated plugin version).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 Feb 21, 2013@asofold3 Members who run around and get them just out of nowhere a hit sorry for me bad English I'm Dutch
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Posted Feb 21, 2013@Cholens
I can't quite figure out what the message is, can you explain it with more details what happens?
@xTyuzi
That's a known problem, the god-mode check present in the dev builds of NCP should make them vulnerable again.
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Posted Feb 20, 2013Got an issue here, players can press ALT key button and freeze their account which:
When they are in ALT-Glitch mode: They are completely frozen, nothing happens. If the person were to die by an outside source while frozen The person can still walk around in a "ghost state". They cannot chat. Hunger is ignored.
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Posted Feb 20, 2013In the latest dev built get members every time hits
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Posted Feb 20, 2013@Liger_XT5
Could be steps (half slabs)?
http://dev.bukkit.org/server-mods/nocheatplus/tickets/435-halfslabs-trigger-survivalfly-violations/#c14
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Posted Feb 20, 2013@MyPictures "Are they staying on top of special block type? Do you run NC+ together with special mods/plugins such as Spoigot or Spout/SpoutCraft? Version of CB and NC+?
The hover check basically prevents players from freezing in midair and staying there."
I have no clue what each person is doing. Though it does annoy them that they get kicked, then when they rejoin, instant kick again without a chance to move or be teleported by an admin.
Latest RB of Spigot and SpoutPlugin.
2013-02-20 20:15:42 [INFO]
Version information[m2013-02-20 20:15:42 [INFO]
Server[m2013-02-20 20:15:42 [INFO] git-Spigot-485 (MC: 1.4.7)[m
2013-02-20 20:15:42 [INFO]
NoCheatPlus[m2013-02-20 20:15:42 [INFO] Plugin: 3.8.9-b353[m
2013-02-20 20:15:42 [INFO] MCAccess: 1.4.7 / CB-DEV(2602+)[m
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Posted Feb 20, 2013@iChrill
Install NCP from here: http://dev.bukkit.org/server-mods/nocheatplus/files/
For 1.4.6/1.4.7 you should install build 353 (or above).
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Posted Feb 20, 2013Hello,
I have this plugin properly installed on my prison server, but for some reason people still can fly using "Nodus" or any other hacked client. How can I fix this? I haven't edited anything around the config.
/iChrille
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Posted Feb 20, 2013@Povax
It is not exactly lightweight, but it is designed to keep things smooth. Further it can be configured to reduce logging for instance.
@chopstick121
RocketBoots needs to add some things and/or hook into the NoCheatPlus-API in order to work. The plugin "SeamlessFlight" does it for example. One point is to set that the player is allowed to fly, but that might still violate speed limits of the creativefly check. Those would have to be adapted.
Concerning essentials + /speed: We don't support individual speed limits yet, only global ones (exception being bypass permissions).
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Posted Feb 19, 2013Whats the resource intensity for this plugin like? Specifically on the cpu.
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Posted Feb 19, 2013@chopstick121
What do you mean with "teleport back"? (setback?)
@MYxNINJAxWEED
Which version of NoCheatPlus are you running? For 1.4.7 you need at least 353.
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Posted Feb 19, 2013Hello, Im having some issues with this Plugin, It has worked in the past but well... Now it doesn't work at all. No kicks for flying, Nothing. Hacking is like its allowed.
Can I have some help? Using the 1.4.7 Version.
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Posted Feb 19, 2013when i have players using rocketboots plugin and essentials /fly with /speed they can teleport back
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Posted Feb 19, 2013@shadowwrad
You should make a ticket for CompatNoCheatPlus - but i need more information about what checks actually alert for it, what skill/feature of the other plugin is involved. I can't test all plugins myself but i might add stuff if i can see the code of the plugin in question and if i know the issues.
@RSGTechno
What is "latest"? Please always specify exact versions as with the "/version NoCheatPlus" and the "/version" command. On a quick testing both latest recommended Spigot and build 543 seem fine. So what means "not working"? Check out the files link here on BukkitDev, be sure to use at least NoCheatPlus 3.8.9-b353 .
@ekhakanza
See my statement above, it works.
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Posted Feb 19, 2013can't work for 1.4.7-R1.1???
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Posted Feb 18, 2013The latest NCP is not working with the latest version of Spigot. Any reason why?
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Posted Feb 18, 2013Request: can you please make this so it wont interfere with the plugin minecraft the last airbender?
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Posted Feb 18, 2013@Boomer_24
Can you share the log with us? You should try to give out as much info's as you can.
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Posted Feb 18, 2013I have the latest version, which is NoCheatPlus 3.8.9-b353 for 1.4.7. I have the CraftBukkit Reccommended Build for 1.4.7. And at startup it causes an error and i caught that it says "Is it up to date? And also people are flying on my server. How do I fix that?
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Posted Feb 18, 2013@Liger_XT5
Are they staying on top of special block type? Do you run NC+ together with special mods/plugins such as Spoigot or Spout/SpoutCraft? Version of CB and NC+?
The hover check basically prevents players from freezing in midair and staying there.
@LordKainzo
I don't think there can be made a switch for this since the old velocity handling has been completely replaced with the new one (If I'm not mistaken). Could you compile that 1 skill in a small plugin and give it to us over PM or something? I could do some movement debugging with it together with NC+. @asofold already implemented a velocity thingi in TestNCP: https://github.com/asofold/TestNCP/blob/master/TestNCP/src/me/asofold/bpl/testncp/TestNCP.java
And we cant get any false positives out of that TestCcp command with NC+.