Features

Movement

• Prevents or limits flying
• Prevents speeding by sending too many moves
• Prevents speeding with vehicles by sending too many moves
• Enforces fall damage
• Prevents no-clipping

Net (Require ProtocolLib)

• Prevents from spamming flying packets to nail other players down in their tracks or cause other unwanted side effects
• Prevents from tracking down other players by abusing a weakness in the Minecraft weather

Fight

• Enforces sane turning speeds
• Prevents hitting of multiple entities at the same time
• Prevents fake critical hits
• Forces to look at the entity before hitting
• Prevents fast health regeneration
• Prevents invulnerability
• Enforces arm swing on fight
• Prevents hits that have gone out of reach
• Prevents too many hits in a row

Block breaking

• Forces to look at the block before breaking
• Prevents quicker block breaking
• Prevents from breaking multiple blocks at the same time
• Forces arm swing on block breaking
• Prevents breaking of blocks that are out of reach
• Forces to interact first before breaking the block

Block interaction

• Forces to look at the block before interacting
• Prevents interaction with blocks that are out of sight
• Prevents interaction spam
• Prevents interaction if block technically not visible

Block placing

• Prevents placing blocks against liquids and air
• Enforces cool-down for sign placement
• Forces to look at a block before placing
• Prevents placement of multiple blocks at the same time
• Prevents block placement if out of reach
• Forces arm swing on block placement
• Prevents projectile spamming

Chat

• Prevents text spam
• Prevents command spam
• Implements captcha capabilities
• Prevents re-logging spam
• Prevents login spam

Combined

• Prevents faking of "bedleave" packets
• Prevents enderpearl abuse (noclip)
• Prevents advanced fight cheats by combining multiple fight checks in one
• Removes invulnerability on login

Inventory

• Prevents dropping of too many items at the same time
• Prevents cheated inventory management
• Prevents bow and arrow spam
• Enforces eating speeds
• Closes inventory in some cases to prevent dupes

Other

• Forces commands like /op and /deop to be ran in the console only
• Can send MOTDs to control some client mods that support it (Reis minimap etc.)
• Prevents creating books with unlimited pages