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 Example video of how NoCheatPlus blocks cheats (outdated plugin version).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 Mar 21, 2015@MyPictures
Does it work on spigot 1.8?
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Posted Mar 20, 2015Does the developer know the 1.8.3 version is failing to compile?
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Posted Mar 20, 2015It just Spams the console with annoying messages that are not needed. It does it with all players so it's kinda like the old story of crying wolf, then when someone is using hacks, I would tend to ignore it. Is there a better setting that would make this event more useful? BTW, I used all your default settings if you need a baseline to go off of. According to this
It shouldn't even be detecting that, right?
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Posted Mar 20, 2015@marubal21
Would need to test it out again, not sure if something changed on mcmmos side.
@Bronzeteufel
We are having dependency issues at the moment (affecting the 1.8.3 builds). You will need to wait till a successful build comes out, till then you can use 804 on 1.8.3 also (not optimal but works).
@MCTylerPVP
Passable is the check which prevents clipping thought blocks, maybe the /back command doesn't load the chunks up first before it teleports the player. The client will sink into the ground a little (because of gravity) since the client also moves even if there are no chunks loaded (MC client bug caused by a workaround). So that message there isn't a error as @Theepwner says. If it really annoys you that much you can disable Passable and allow no clipping.
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Posted Mar 19, 2015@MCTylerPVP
That isn't really an error...
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Posted Mar 19, 2015Alright, gonna disable this plugin for now...I don't like errors in my console...I'll check back weekly and look for a fix.
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Posted Mar 18, 2015He's just running basic server commands...why is this coming up?
Version:
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Posted Mar 18, 2015The latest 4 dev builds are not available? :( Looking for a build with 1.8.3 support
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Posted Mar 16, 2015Using: McMMO Build #36, NCP Build #803, CNCP Build #72
Treefeller & Leaf Blower, don't seem to be functioning. Breaking the base block of a tree doesn't seem to chop down the tree, but if i disable NCP & CNCP Treefeller works just fine.
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Posted Mar 16, 2015@JessicaMae18890
Please paste the error in your latest.log on a new ticket over pastebin (or just upload it here under attachments) and we can help you out.
For mcmmo its recommended to run compatNoCheatPlus alongside NC+: http://dev.bukkit.org/server-mods/compatnocheatplus-cncp/
@GodsDead
Build 804 from Jenkins. At the moment there is no build out to support 1.8.3 fully but 804 will run also in bukkitAPI only mode which is fine for now.
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Posted Mar 16, 2015What is the most stable Development release for 1.8.3? I am using Build 793 at present.
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Posted Mar 16, 2015i have spigot 1.8, and mcmmo what nocheatplus plugins should i download, really confused and they all fail when i load them on the server
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Posted Mar 15, 2015@MyPictures
This is really helpful, thanks a million! :)
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Posted Mar 15, 2015@EarlyReflex
Maybe you were looking for this: https://github.com/MyPictures/NoCheatPlus/wiki/Global#actions
https://github.com/MyPictures/NoCheatPlus/wiki/Backend#violations
Its not finished yet but it gives a basic idea what VL is. Each check generates their VL differently and survivalfly is one which generates VL in larger chucks (500 VL) compared to the others.
If you really think its because he gets stuck in mid air, then I suggest trying to adjust the hover check (sub check of SurvivalFly): https://github.com/asofold/NCPDocs/blob/master/wiki/configuration/checks%2Fmoving%2Fmoving.creole (Probably setting step and ticks higher might do the trick)
If you want to go even further you can do /ncp debug player <NameOfPlayer> here. Then wait till he gets rubber banded and do /ncp reload
Now you can upload the nocheatplus.log (/plugins/NoCheatPlus) in a new ticket and we can pretty much exactly tell you what happened.
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Posted Mar 14, 2015@MyPictures
Hello, and thx for your support!
In fact I think the plugin does its job as it should, but I could be wrong. I just fail to understand the vl numbers. what they represent, what unit, what's the scale of it, how high can it go? A while ago I've beeen given a link to a page describing them more or less in details, but I can't find it anymore on the wiki.
I noticed that users more prone to be kicked for survival fly are those with higher ping times (like over 175-200ms). It's easy to figure that their client don't sync as quickly, thus less frequently, with the server. It's normal for the plugin to see them hanging in the air for longer times!
For the moment I kinda fixed the problem by using a higher vl value for being kicked for flying (vl>7500) since those who suffered it the most always had vl levels of around 5000 to 6000. My issue is not having a clue about what that 7500 means! The config default is 1500.
Apart from that I'm not experiencing any noticeable issues, I think it works just fine! :)
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Posted Mar 14, 2015@EarlyReflex
Hey EarlyReflex! The builds we provider undergo basic testing to avoid issues like you are experiencing right now. We will need more information's (server and nocheatplus version would be really good to have) in order to help you out. I recommend to open up a new ticket for this issue so we can keep everything in one place instead of searching out comments.
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Posted Mar 14, 2015Some of our players keep getting kicked for flying for no reason whatsover. One keeps getting kicked for simply jumping down 2 blocks. Configuring the "SurvivalFly" section looks like witchcraft more than anything else! Here's a good example:
You can see he's been kicked, with a VL of almost 6000, but the distance "flown" is an absolute 0.00 blocks! I don't get the "VL" part at all...
To make the server playable I had to use a "band-aid" solution, by removing the "cmd:kickfly" at the end of the line. But the "cancel" still kicks in and tps the player back to where he was before jumping down, and he takes damage for nothing. I'm thinking about disabling the whole "SurvivalFly" section altogether, before everyone quits the server. Any help would be appreciated!
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Posted Mar 14, 2015@rtcabooservb
They know, I just talked with them. They say they are working on it
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Posted Mar 13, 2015Dev builds seem to be failing to compile. :(
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Posted Mar 11, 2015@Chiaration
In that case I recommend to fill out a ticket with the "defect" layout and try to explain it as good as possible. It might just be a outdated NC+ version that causes your issue.