ORIGINAL:
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NoCheatPlus is an unofficial fork of the famous plugin NoCheat created by Evenprime. NoCheatPlus attempts to enforce "vanilla Minecraft" mechanics, as well as preventing players from abusing weaknesses in Minecraft or its protocol. Organised in different sections, various checks are performed to test players doing, covering a wide range including flying and speeding, fighting hacks, fast block breaking and nukers, inventory hacks, chat spam and other types of malicious behavior. For a more complete list have a look at the Features Page.

NoCheatPlus still puts emphasis on configurability and allows you to alter all actions that are carried out when a player fails a check, according to your needs. So you can just have players actions be silently cancelled, log their actions to in-game chat or files, or let arbitrary commands be executed, all possible to be differentiated by the level of violation. Many aspects can be configured on a per world basis as well, there are plenty of bypass permissions for individual checks and you can also alter other aspects such as allowed speeds for walking, sprinting, flying, and more!

Certainly NoCheatPlus is not a magical bullet, it uses a lot of heuristics and even guessing mixed with exact analysis as well as rather statistical judgement methods, so you will encounter false positives here and there and also not catch every single violation. One of the strengths of NoCheatPlus is the configurability, if your server happens to get many false positives you can apart from filing a support request also lessen the punishments by configuration or even deactivate the check if you want to allow players doing something.

Protective plugins also have to take part in the classical cat and mice play, expect hack clients to update now and then, forcing protection plugins to also update, if you find any flaws or uncovered hacks, you can help us improving the plugin by telling us!

GRAMMAR, SPELLING, STRUCTURE, RUN-ON SENTENCES FIXED:
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NoCheatPlus is an unofficial fork of the famous plugin NoCheat created by Evenprime. NoCheatPlus attempts to enforce "vanilla Minecraft" mechanics, as well as preventing players from abusing weaknesses in Minecraft or its protocol. Various checks are performed to test a player's actions, including flying and speeding, fighting hacks, fast block breaking and nukers, inventory hacks, chat spam and other types of malicious behavior. For a more complete list, have a look at the Features Page.

NoCheatPlus continues NoCheat's emphasis on the ability to configure all actions that are carried out when a player fails a check, according to your needs. You can have player's actions be silently cancelled, log their actions to in-game chat or files, or let arbitrary commands be executed based on the player's violation level. Many aspects of NoCheatPlus can be configured on a per world basis as well; there are bypass permissions for individual checks, and you can also alter other aspects of the system such as allowed speeds for walking, sprinting, flying, and more!

NoCheatPlus is certainly not a magical bullet; it uses a heuristics, event analysis, statistical judgement, and even guessing to determine whether a player is hacking or not. Because of this, you could encounter false-positives, or the system could not catch a hack. To combat this, NoCheatPlus includes configuration options for it's users, you may lessen the severity of a punishment, or even deactivate a specific check.

Protective plugins like NoCheatPlus always have to take part in the classical cat and mice play; expect hacked clients to update now and then, forcing protection plugins to also update. If you find any flaws or uncovered hacks, you can help us improving the plugin by telling us <link somewhere>!