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 Example video of how NoCheatPlus blocks cheats (outdated plugin version).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 Sep 19, 2013First of all please state the output of the "ncp version" command.
NCP does not teleport players "below", if at all NCP teleports players back to the last ground position. For better judgment we need the output of the command.
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Posted Sep 19, 2013OK, I need some help with this plugin... It has broken our parkour courses by making it so that each time someone makes a jump, they will just teleport down to the ground, even on extremely easy jumps (3-4 blocks). I need to know how to make this more lenient for I'm what I'm guessing is SurvivalFly but i can't really understand the configuration files nor do I know what VL means. Please someone help me with this, it is probably right under my nose...
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Posted Sep 19, 2013@AS1LV3RN1NJA
Thanks, i will check now.
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Posted Sep 19, 2013Changelog mentions: The documentation will be brought back to shape with the NCPDocs project at GitHub, with time.
The link is broken.
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Posted Sep 19, 2013A new release is pending approval, which will amongst other fixes remove the messages for the usual setup (bound to debug flag).
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Posted Sep 19, 2013@killerbyte12
Read more about it here: http://dev.bukkit.org/bukkit-plugins/nocheatplus/tickets/630-metrics-403-error-forbidden-http-access-error-code/
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Posted Sep 19, 2013Im getting this on my logs
[WARNING] [NoCheatPlus] Metrics error: ERR (IOException): Server returned HTTP response code: 403 for URL:
Whats up with that?
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Posted Sep 19, 2013@dotapurex1
@MyPictures
For chests the "proximityhider" feature of Orebfuscator might be of interest.
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Posted Sep 19, 2013@dotapurex1
Not possible because those 2 mods are mostly client sided. You can use Spigot to limit the radius at which mobs and other entities get visible for the player.
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Posted Sep 18, 2013Is there a plugin that stops radarbro or any sorts of mods that lets you find chests / mob spawners on a minimap?
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Posted Sep 18, 2013@jacob_vejvoda
The error just states that the metrics service is not reachable at the moment, next release will remove the messages for the normal case, only show if debug is set.
To bypass the flying check you might give the nocheatplus.checks.moving.survivalfly permission for that world. This will allow them to fly and climb, though flying speed would still be monitored by the creativefly check.
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Posted Sep 18, 2013Thanks, I got a xray preventer-ish plugin.
Also I don't actuality want players to be able to cheat, but I have a plugin that lets you climb and fly in a certain world.
This error come up on the console evrey now and then, but it dosen't seem to prevent no cheat from working: 18.09 10:44:11 [Server] WARNING Metrics error: ERR (IOException): Server returned HTTP response code: 403 for URL: http://report.mcstats.org/plugin/NoCheatPlus
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Posted Sep 18, 2013@jacob_vejvoda
No it does not stop xray. There are few plugins that stop xray (in fact none). Some plugins detect heavy use of xray, the plugin Orebfuscator is capable of preventing most of what xray can do, i suggest you have a look at that one. Point being that xray is a topic for a specialized plugin rather.
To let players cheat arbitrarily you might give them the permissions nocheatplus.checks and nocheatplus.mods ...
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Posted Sep 18, 2013This doesn't stop xray...
Also I got this error: 18.09 10:44:11 [Server] WARNING Metrics error: ERR (IOException): Server returned HTTP response code: 403 for URL: http://report.mcstats.org/plugin/NoCheatPlus
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Posted Sep 17, 2013What perm can I give my players so they can cheat in one world?
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Posted Sep 17, 2013@Shooty_
SpeedHack of CheatEngine is spamming packets on the server to succeed with faster movement. Be sure your "MorePackets" check is enabled and also make sure NC+ and your sever are up to date. If it still happens then please full out a ticket as @asofold suggested.
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Posted Sep 17, 2013@Shooty_
Please fill in a ticket with the requested information.
This likely is not a bug in NCP itself, we do need more information.
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Posted Sep 17, 2013@asofold
My players can go up to 10x faster without any problem...
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Posted Sep 16, 2013@Shooty_
No quick fix, note: Ticket 378. Speeding should be limited (no "totally working"), but could use improvements.
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Posted Sep 16, 2013Speed hack with cheatengine si totally working... a fix maybe ?