NetworkSlotsShield -----
Prevent crashes caused by invalid inventory slot packets️ NetworkSlotsShield
Secure your Minecraft server against visual glitches and client crashes caused by malicious inventory packets.
Features
- Blocks invalid SET_SLOT packets (slot ≥ 46)
- Blocks oversized WINDOW_ITEMS packets (abnormal item list)
- Packet throttle system to block spam (per-player cooldown)
- Grace period system after teleport or GUI open (prevents false positives)
- Smart log throttling with repetition grouping ((xN))
- Toggle protection and debug via commands
- Lightweight, async-safe and production ready
⚙️ Commands
/networkshield true – Enable protection
/networkshield false – Disable protection
/networkshield debug true – Enable debug logging
/networkshield debug false – Disable debug logging
Permission: networkshield.toggle
Installation
- Place NetworkSlotsShield.jar into your `/plugins` folder
- Install ProtocolLib (required)
- Restart your server — done!
✅ Compatibility
- ✔️ Spigot 1.20+
- ✔️ Paper 1.20+
- ✔️ Geyser / Floodgate safe
Sample Logs
Code (Text):
[NetworkShield] [DEBUG] Blocked SET_SLOT: slot 52 > max 45
[NetworkShield] [DEBUG] Allowed SET_SLOT slot=32 (clear)
[NetworkShield] [DEBUG] Blocked abnormal WINDOW_ITEMS (size=150)
[NetworkShield] [DEBUG] Slot packet flood blocked for Player123 (x4)
The plugin is open-source and available here:
https://github.com/YourS4nty/NetworkShield
License
This project is licensed under the MIT License.
Developed with ❤️ by @YourS4nty
Resource Information
Author:
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Total Downloads:
34
First Release:
Jul 9, 2025
Last Update:
Jul 9, 2025
Category:
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