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 Example video of how NoCheatPlus blocks cheats (outdated plugin version).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 24, 2013@silverwolf0708
Make sure you have "allow-flight=false" in your server.properties.
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Posted Aug 22, 2013I Set Up NocheatPlus On My Server But People Can Still Fly. Any Suggestions?
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Posted Aug 22, 2013@asofold
I have a parkour area. Some jumps cause players to be pulled down to the ground instantly. It's NoCheatPlus doing it but im not sure on a way to solve this. Obviously the players get annoyed when they get towards the top and they get jolted down really quickly. Happens on some smaller jumps too. How can we fix this? Which setting?
Regards
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Posted Aug 22, 2013@tubelius
Maybe you have bypass permissions to bypass those checks? Did you test as default user? Did you remove /op from you?
Aura: NoCheatPlus will block most parts of it such as 1 hit kill with fists, hitting out of range and others but we cant distinguish smart aimbots from players because that's pretty impossible for us. However a aimbot has pretty low chance of winning a fight if the enemy uses some good combat against it (jump to get criticals for example). More here: http://dev.bukkit.org/bukkit-plugins/nocheatplus/tickets/51-forcefield-aimbot-reach/
NoFall: Pretty impossible to get around this check because it takes the last distance you have fallen and calculates the damage you were supposed to get and forces you to get that damage. There could be a new bug/weakness in CraftBukkit/Minecraft or maybe just a bug in NoFall check that might make it possible but very unlikely for me.
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Posted Aug 21, 2013It doesn't prevent Rubix features like: *Aura and NoFall. I really hope these protections could be added.
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Posted Aug 20, 2013@mormaii2
It really depends on what kind of spam you want to detect stricter. There are several ways to do it you can either make violations of chat checks more heavy or you can edit the actions to execute faster then normal. More info's here: https://github.com/asofold/NCPDocs/blob/master/wiki/configuration/checks/chat/chat.creole (Docs still not finished but on the way).
@igztryhard
You do /ncp info <AffectedPlayerName> to see which checks that players has having problems with (Is that playing lagging?). I highly recommend to try and reproduce this by yourself if possible. Some players make alerts on purpose to make you disable checks of NoCheatPlus so they can cheat on your server.
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Posted Aug 20, 2013What check would I have to change if my players are having issues with hit detection in pvp?
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Posted Aug 20, 2013How could I make the spam filter that manages the speed at which you can send messages more strict? I don't know which values should I change.
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Posted Aug 20, 2013@KrustyLv
Which type of golden apple? that one out of nuggets or the other one out of gold blocks? Also we need your CraftBukkit and NoCheatPlus version. Does your server or that player have lag on your server? Can we get a /ncp info <playername> and /ncp lag output log please?
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Posted Aug 20, 2013Why players cant sometimes go in pvp? They are in fight when they are eating golden apple there shows message <player> failed FastHeal.
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Posted Aug 20, 2013@deaddude22
Please update to the latest NoCheatPlus development build, I found out this already and we could resolve this together with @asofold. The NPE shows up every time you type a wrong ncp command or don't have enough permissions to run a command. This bug only affects development builds! More here: http://dev.bukkit.org/bukkit-plugins/nocheatplus/tickets/614-npe-on-wrong-ncp-sub-commands-or-permissions/
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Posted Aug 19, 2013@asofold
Got this in my console: http://pastebin.com/pB99X26U
:O
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Posted Aug 18, 2013@AreQPL
ok ...
Those likely conflict, we will try to do something about it .
(@MyPictures)
@shahiem99
Please only downloaded plugins from official places like BukkitDev if they are available there. You are running some "NCPP" plugin which is not NoCheatPlus (NCP). Likely op bypasses exist with that one, you might want to reinstall all plugins and check if any data corruption has happened.
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Posted Aug 18, 2013@shahiem99
We need more information's to help you out. A /version or better /ncp version output would be really helpful. The error log isn't complete also, try to provide the full server.log if possible. I suggest opening up a new ticket with the "defect" template for this problem. Are you using mods on your server?
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Posted Aug 18, 2013Big errors http://pastie.org/8247798
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Posted Aug 18, 2013@asofold
Hi, yes, I'm using entry/exit flags to make VIP shops.
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Posted Aug 17, 2013@MasterMithrandir
Would be rather hard for us a achieve a good fix for this and idk but I cant reproduce it without any plugins enabled. Maybe its just me but the duped item is like a clone and wont work if I try to stack it.
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Posted Aug 17, 2013@MyPictures
I am using Spigot's latest build, which aparently does not manage dupes. And I sent asofold a video demonstrating how one of the dupes I found works.
I will see if this has been reported to Spigot, as all that stuff should go to them. Just wondered If temporary fixes could be added to NoCheatPlus, many servers would benefit greatly from this :)
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Posted Aug 17, 2013@janjanjan11111
Possible but wouldn't be that effective because false positives would show up all the time if a player switches tools fast. Also it doesn't really give them and advantage, it just allows them to be lazy and not having to switch tools manually. We will however implement some new checks that prevent clients from managing Inventory's even if the inventory is closed server side.
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Posted Aug 17, 2013They should add something for autotool!