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NPN Advanced Packet Protection

hangar.papermc.io

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Spec score 6.6 #41 of 57 in Minecraft Anti-Cheat Plugins

Spec sheet

Purpose
NPN is a lightweight Minecraft server plugin designed to protect against malformed packets, packet abuse, inventory exploits, and protocol manipulation.Read 8 Oct 2026 · hangar.papermc.io
Support
The maker invites users to report bugs, exploits, and false positives, request installation assistance or features, and join Discord.Read 8 Oct 2026 · hangar.papermc.io
License
The listing identifies NPN's license as LGPL.Read 8 Oct 2026 · hangar.papermc.io
Architecture
Each protection module has its own session manager, context system, packet trackers, validators, cancel engine, and violation engine.Read 8 Oct 2026 · hangar.papermc.io
Beta status
NPN is currently in Beta, with additional protection modules and improvements planned for future releases.Read 8 Oct 2026 · hangar.papermc.io
Compatibility
The listing specifies Minecraft 1.20.1–Latest, Java 17 or newer, and Paper, Spigot, Bukkit, or Purpur server software.Read 8 Oct 2026 · hangar.papermc.io
Current features
Listed features include WindowClick protection, session-based detection, packet burst analysis, duplicate and replay detection, packet state validation, fingerprinting and configurable thresholds.Read 8 Oct 2026 · hangar.papermc.io
Current protections
Listed current features include WindowClick protection, session-based detection, packet burst analysis, duplicate and replay detection, packet state validation, and configurable thresholds.Read 8 Oct 2026 · hangar.papermc.io
Dependency
PacketEvents (latest) is required, and the maker says to download it before installing NPN.Read 8 Oct 2026 · hangar.papermc.io
Intended servers
The maker lists SMP, survival, PvP, and network environments as suitable uses.Read 8 Oct 2026 · hangar.papermc.io
Latest release details
Version 5.0.0 adds memory checks, packet-window statistics, packet context metadata, and configurable memory thresholds.Read 8 Oct 2026 · hangar.papermc.io
Minecraft and Java versions
The listed compatibility is Minecraft 1.20.1 to Latest and Java 17 or newer.Read 8 Oct 2026 · hangar.papermc.io
Modular design
Each protection module has a session manager, context system, packet trackers, validators, cancel engine and violation engine.Read 8 Oct 2026 · hangar.papermc.io
Not an anticheat
The maker says NPN focuses on packet protection instead of functioning as a traditional anticheat.Read 8 Oct 2026 · hangar.papermc.io
Performance
The maker describes NPN as lightweight, low memory usage, and optimized for high player counts.Read 8 Oct 2026 · hangar.papermc.io
Server compatibility
The listing names Paper, Spigot, Bukkit and Purpur as supported server software.Read 8 Oct 2026 · hangar.papermc.io
Status and roadmap
NPN is marked as in beta; planned features include payload protection, packet flood protection, invalid packet detection and connection abuse protection.Read 8 Oct 2026 · hangar.papermc.io

Where Specifiction places it

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