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 Example video of how NoCheatPlus blocks cheats (outdated plugin version).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 Aug 26, 2014Any way to fix this?
My survivalfly: http://pastebin.com/jtTANVMk
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Posted Aug 25, 2014@chrisbruijnes
Yes that is due to NoCheatPlus. The server thinks you should still be blocking your sword, but the client thinks that it shouldn't. NoCheatPlus sees the client walking too fast to be normal while blocking the sword, so it flags you for SurvivalFly.
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Posted Aug 25, 2014Version: http://gyazo.com/2269836eaded150f58ffe557a3b0bfb6
When you're running or walking and suddenly you "lag" and can't move. You like move forward then go back to the block you were on until you rightclick or shift.
Anyone a idea if this is because of NoCheatPlus?
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Posted Aug 23, 2014@asofold: Thanks. I just turned off the spam check. And my server is 1.7.2. Thanks for helping!
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Posted Aug 23, 2014@huyou1115
What is the output for the "ncp version" command? Can you post the full output?
Is your server up to date? There has been some bug at some point - did you change your confgiuration or not regenerate it since old age? YOu might also paste that and send the link...
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Posted Aug 23, 2014@huyou1115
Hello! Have you tried turning it off and back on?
Oh, and also: https://github.com/asofold/NCPDocs/blob/master/wiki/configuration/..%2Fdevelopment%2Fdev-pinboard.creole#chat-checks Try turning off the chat check, too.
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Posted Aug 23, 2014I just found a problem about this plugin. I spammed and it warned me. Then I just keep spamming. Finally I got kicked. But then me and other players can't join the server any more. And I tried to type some commands in consle. It relied Nothing. I even can't stop the server. (PS: My Server can't banip.Cuz Everyone joins my server throughy outer net to my intranet.Then everyone will be banned.) Hope someone can help me!
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Posted Aug 22, 2014@dutcholdskool
You are welcome :)
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Posted Aug 22, 2014Just want to say thank you for developing and maintaining this plugin.
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Posted Aug 18, 2014@asofold
Its probably the velocity fly @asofold and other velocity abuse. Seems they started to spread hardcore.
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Posted Aug 17, 2014@KevinEssence
I can't judge it. Are you running the lates version of NCP ?
You should make a ticket, stating the output of the "ncp version" command, including some more info on what players do (tons of what actually), if you have observed it (or by hearsay), maybe the configuration as a paste. Are there any errors or warnings from NCP in the logs? Is there anything special to the servers (e.g. special mods)?
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Posted Aug 17, 2014Players are still flying on all servers, and bypassing a ton of cheats. Using the latest version. Used to block this stuff not sure what happened after the uuids though. Are we doing something wrong? No errors, on 1.7.10, latest ncp.
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Posted Aug 17, 2014@niknea
You can use temporary exemption:
https://github.com/NoCheatPlus/NoCheatPlus/blob/master/NCPCore/src/main/java/fr/neatmonster/nocheatplus/hooks/NCPExemptionManager.java
You just call exemptPermanently for the check type(s) and when done unexempt(check type(s).
Hooks might also be a way, however they get called after check failures (as described on the hooks page):
https://github.com/NoCheatPlus/NoCheatPlus/blob/master/NCPCore/src/main/java/fr/neatmonster/nocheatplus/hooks/NCPHookManager.java
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Posted Aug 16, 2014@MyPictures
How would I use that method (the exemption method). As I cant see the class itself, is it an event? How would I use it?
Thanks, Niknea
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Posted Aug 16, 2014@chrisbadaoui99
Glad I could be of some help :) Good luck on your server!
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Posted Aug 16, 2014@ProdigyOG
Thank you so much! You have actually saved my server! You are a legend mate, Thanks so much! Have a great day <333
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Posted Aug 16, 2014@chrisbadaoui99
NoCheatPlus hasn't done anything to protect against high enchantments on weapons because the All U Want Mod only works when in creative mode. (See ticket #560)
Make sure that players aren't able to take items from when they are creative (perhaps from the creative server) to the factions server. They may be using enderchests.
Also try this plugin out: https://github.com/daboross/RemoveGodItems
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Posted Aug 16, 2014@MyPictures
Well there is no problem with the plugin but i was just wondering, I am having a issue where people are getting MASSIVE enchantments on items and i know what mod they are using. It is 'All U Want Mod' or 'To Many Items'
This problem is occurring in my faction server but i have been told that you guys have blocked those mods in nocheatplus. Is that correct? If so they dont seem to be working and i was wondering if there is any way to block those mods as it is destroying the Eco of my server where people can just put a chest plate on with enchantments when someone hits you it will kill you instantly no matter what kind of Armour you have on. Thanks.
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Posted Aug 15, 2014@chrisbadaoui99
@MyPictures
We are not changing the project to be written for offline mode, so there should not be a problem with the guidelines. If there are specific issues with other plugins, those probably can be resolved somehow, we would need to know more details on actual issues.
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Posted Aug 15, 2014@chrisbadaoui99
As long as the issue is related to NoCheatPlus we will provide official and free support to everyone, because it could after all enhance the quality of NC+ which we strongly aim for. For other issue you should consult the bukkit forums (or other ones because Bukkit Forums don't support offline mode) or contact that plugin author directly.
One note : Because of 3.7 Offline mode submission, we can sadly not help out with issues that are crucial for offline mode servers only.
@TheKnight787
Yea. We have to allow some freedom since velocity is client sided. There is already a ticket open for it if you want to keep track of our progress on it: http://dev.bukkit.org/bukkit-plugins/nocheatplus/tickets/286-players-hit-by-anything-can-fly-shortly/
@niknea
Yes we provide a exemption API for such cases. The docs are here: https://github.com/asofold/NCPDocs/blob/master/wiki/development/api.creole
and a good example can be found here: http://dev.bukkit.org/bukkit-plugins/compatnocheatplus-cncp/