minecraft-cheat-detection

Detect KillAura by checking attack reach beyond 4.5 blocks and verifying the attacker's view direction angles toward the target. Hits without proper head rotation or instant target switching are strong indicators to flag or kick the player.

Established anticheat plugins include NoCheatPlus (free) and Matrix, Vulcan, or Spartan (paid). Combine them with Paper or Purpur server software, which includes built-in exploit protections and anti-xray engine modes.

ESP and x-ray cannot be detected directly because they are client-side only. Mitigate them by enabling Paper's anti-xray engine mode 2, reducing entity-broadcast-range-percentage, and lowering view-distance in server.properties.

Monitor PlayerMoveEvent distances per tick and flag movement exceeding roughly 0.7 blocks per tick for non-flying players. Vertical movement without jump packets and missing fall damage after high-altitude movement also indicate fly hacks.

Modern cheat clients obfuscate class names and can detect inspection attempts, making signature-based client checks easy to evade. Server-side behavioral detection of movement, reach, and rotation anomalies is more reliable.