NoCheatPlus

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NoCheatPlus

Detect and fight the exploitation of various flaws/bugs in Minecraft!

Minecraft 1.11.2 and latest features are currently only available on Jenkins - once things stabilize, stable builds will be available here again.

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 Example video of how NoCheatPlus blocks cheats (outdated plugin version).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.

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

Forge_User_61842651
- Join Date: 8/29/2011
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#7295 Forge_User_61842651

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Posted Nov 28, 2015
@marubal21

Thank you :) - i have reproduced the end portal frame part and couldn't fix quickly (looks like on-ground checking doesn't account for the flags in the way it's been mean to be, but i'll re-iterate on sunday, including fences).

Could be a quick fix to set checks.moving.yonground to 0.0625 in the configuration of NCP (the key does not exist in the default configuration).

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Penturt
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#7294 Penturt

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Posted Nov 28, 2015
@asofold

Server: Spigot-5f38d38-12698ea (MC: 1.8.8) (Implementing API version 1.8.8-R0.1-SNAPSHOT) NoCheatPlus: version 3.13.0-BETA-sMD5NET-b878

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Forge_User_61842651
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#7293 Forge_User_61842651

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Posted Nov 28, 2015
@File14

We will cut down that thing soon.

@marubal21

Not sure, need to reproduce - what server version are you using?

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Penturt
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#7292 Penturt

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Posted Nov 27, 2015
Quick question, currently i'm using build# 878 of NCP...

Players are triggering the "SurvivalFly" check and get pushed back whenever they walk on fences and/or End Portal Frame Blocks without or without Eyes of Ender in them. is there a way to ignore checks on these blocks for "SurvivalFly"?

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_ForgeUser14104611
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#7291 _ForgeUser14104611

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Posted Nov 27, 2015
This hacked client with speed hack is bypassing NoCheatPlus.

https://www.wurst-client.tk/news/2015-11-27-Wurst-2-10/

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Forge_User_61842651
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#7290 Forge_User_61842651

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Posted Nov 26, 2015
@MarkElf2204

This is a complex topic :). In general we maintain backwards compatibility, currently down to 1.4.5-R1.0, though we clearly focus on the latest Minecraft version and on incoming reports of issues.

First of all, which version of 1.7 ? 1.7.2 or 1.7.10 or which one?

Stability is also relative, because the fight.speed check might not work with older version of NCP, which can be mended using ProtocolLib with the appropriate version of NCP.

Now currently, the latest beta build available at BukkitDev confines NCP to only use ProtocolLib for Mineraft 1.8 - this has been fixed in development build 884 (available at our Jenkins location, release following soon-ish) for the case that you are using ProtocolLib 3.6.4 (currently latest available download both at BukkitDev and Spigot page).

The older builds of NCP are also lacking detection of the glide-by-velocity exploit - while in the latest builds the y-axis handling has changed fundamentally, which means some potential for new/other false positives. These changes have been around for a short while and are probably in use by a couple of hundreds of people, and we haven't received too much feedback. Some issues got better for some people, but we can't really tell how all those special game modews work on 500 player servers or on 1-core 20 slot servers with random potion effect levels... so we are always depending on feedback, despite testing parkour, preset structures and some kind of test-map we build with issues being spotted.

Now the quick choice is:

Use build 884 (available at Jenkins) + ProtocolLib 3.6.4 (available at BukkitDev) for the latest supposedly quite stablish thing, fixing a range of nasty cheats, increasing compatibility with attributes and other. This is also the line of development that will receive new fixes even for 1.7, even for 1.4.5-R1.0 (if reported).
Use some lower build fro 1.7.x, e.g. 743/beta (Available at BukkitDev), that has been downloaded much (compare downloads on BukkitDev). This build will possibly not be able to detect the frequency of attacking, due to changes in CraftBukkit, and it will also allow glide-by-velocity. There might even be more issues exploits with passable and other checks that we might've fixed in-between (it's been a while).
Edit: Actually the absolutely latest build with the old-style y-axis handling, with a lot of false positives removed, would be development build 853 (marked as recommended and "mostly stable", available at our Jenkins location). This could be better than the 743-beta, but we can't really compare popularity there, because it's not been released on BukkitDev.
Last edited by Forge_User_61842651: Nov 26, 2015

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_ForgeUser21851873
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#7289 _ForgeUser21851873

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Posted Nov 26, 2015
Might I ask: Can someone link me a stable 1.7 version of NCP and additionally inform me as to how I could disable the knockback check with the current config?

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Forge_User_61842651
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#7288 Forge_User_61842651

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Posted Nov 26, 2015
@publicg

I'll comment on the ticket for cncp, once changes are made.

@Sitmobedaf

Can't judge from that little information :). Any details on what poses issues (side conditions, certain blocks/moves/effects)?

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_ForgeUser11606419
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#7287 _ForgeUser11606419

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Posted Nov 26, 2015
asofold, still there are problems with fly-blocking. build-884

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_ForgeUser7147840
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#7286 _ForgeUser7147840

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Posted Nov 25, 2015
@asofold

i didnt get to run the latest dev vesions of ncp and compatncp long enough to see possible crashes, the players wanted them off the server because their skills fail a lot.

Last edited by _ForgeUser7147840: Nov 25, 2015

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Forge_User_61842651
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#7285 Forge_User_61842651

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Posted Nov 24, 2015
@publicg

So it does not crash with latest builds? [Pushed 3.13.1 as a bug fix beta release, waiting for approval here on dbo.]
For SkillAPI likely nothing changed, unless they updated to use the API of NCP. I will have a look some time soon, what i can do for a fast thing.
Last edited by Forge_User_61842651: Nov 25, 2015

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_ForgeUser7147840
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#7284 _ForgeUser7147840

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Posted Nov 24, 2015
i updated skillapi to latest release, ncp and compatncp to latest dev versions and the affected skillapi skills sometimes work. there are no errors or violations at the ncp logfile. all cheat protections are active

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_ForgeUser7147840
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#7283 _ForgeUser7147840

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Posted Nov 24, 2015
since i installed nocheatplus 3.13 server crashes

http://hastebin.com/xobagabuku.coffee

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Forge_User_61842651
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#7282 Forge_User_61842651

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Posted Nov 23, 2015
@Schneidertm

Might be fixed in the latest development build (880).

Last edited by Forge_User_61842651: Nov 23, 2015

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_ForgeUser7745776

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#7281 Posted Nov 23, 2015

@asofold

Thanks for the fast response. I just want to hide the ncp messages in the ingame chat.

logging:
  active: true
  maxqueuesize: 5000
  extended:
    status: false
    allviolations:
      debugonly: false
      backend:
        trace: false
        notify: false
  backend:
    console:
      active: true
      asynchronous: true
    file:
      active: true
      prefix: ''
      filename: nocheatplus.log
    ingamechat:
      active: false
      prefix: '&cNCP: &f'
      subscriptions: false

Forge_User_61842651
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#7280 Forge_User_61842651

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Posted Nov 23, 2015
@publicg

http://dev.bukkit.org/bukkit-plugins/compatnocheatplus-cncp/tickets/36-skill-api-compatible/

Please ensure to test with the latest release (currently build 878).

@Tintin159

Complex topic: Ticket 364

Likely we will make an attempt some time soon.

@Schneidertm

The logging configuration isn't 100% stringent, as it's been focused on the violation alerts in the past, while status messages are always logged to the file. So you can't fully disable the file - or do violation notifications still show up in there? That would be a (newly introduced) bug then. Fully disabling is possible with setting an invalid file name ("" might do it). If you ever intend to being able to do on the fly debug logging, you might want to keep the file enabled though.

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_ForgeUser7745776
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#7279 _ForgeUser7745776

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Posted Nov 23, 2015
Thank you for the new beta release! But I'm not able to disable the config option logging -> backend -> ingamechat -> active Spigot 1.8.8, NCP 3.13.0, Java8

Last edited by _ForgeUser7745776: Nov 23, 2015

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_ForgeUser9472654
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#7278 _ForgeUser9472654

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Posted Nov 23, 2015
too bad the problem Slime block on piston not bouncing players do not be settled in this latest version

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_ForgeUser7147840
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#7277 _ForgeUser7147840

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Posted Nov 23, 2015
please add exception or compatibility for skillapi. the cheat protections break skillapi

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Forge_User_61842651
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#7276 Forge_User_61842651

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Posted Nov 22, 2015
For those who checked comments and not file uploads in the subscription section, and all others who read this, note the new beta release:
3.13.0-BETA-sMD5NET-b878

Last edited by Forge_User_61842651: Nov 22, 2015

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Project ID

38212
Created

Apr 2, 2012
Last Released File

Jan 11, 2018
Total Downloads

1,896,985
License

GNU General Public License ver...

Bukkit

NoCheatPlus

Bukkit Plugins

NoCheatPlus

Table of Contents

Introduction

Recommended

ProtocolLib

CompatNoCheatPlus (cncp)

Orebfuscator

Downloads and History of Changes

Support

Documentation Resources

Contact us

Comments

About This Project

Categories

Members

Recent Files

Bukkit