JRSecurity
JRSecurity implements the modern Mojang 1.20.5+ Payload API to deliver a secure and authentic mod‑list handshake from client to server. Built for Paper,Spighot,Bukkit Server + Fabric Client that rely on mod compliance.
About this Mod
JRSecurity — Secure, mod list verification
JRSecurity is a lightweight security stack consisting of a Fabric client mod and a Paper/Spigot plugin. It securely transmits a player’s installed mod list to supported servers using Minecraft’s modern 1.20.5+ Custom Payload system, enabling fair‑play verification without invasive scanning or gameplay impact.
It requires Client Mod (Fabric) and Server Plugin (Spighot, Paper, Bukkit)!
🖥️ Client (Fabric 1.20.5+)
The client sends your installed mod list to the server right after joining via the Mojang 1.20.5+ payload API. Transmission is robust and version‑safe, built to work alongside vanilla‑like networking.
FeaturesSends a cleaned, canonical mod and resourcepack list after a successful join
Uses the modern Mojang Custom Payload / PacketCodec (1.20.5+)
Zero gameplay changes, low overhead
Designed to interoperate with the JRSecurity server plugin
Compatibility
Minecraft: 1.20.5 – 1.21.x
Loader: Fabric
Java: 17+
Installation
- Install Fabric Loader + Fabric API
- Drop JRSecurity (client mod) into your mods/ folder
- Join a server running the JRSecurity plugin—your mod list is sent automatically
🖧 Server Plugin (Paper/Spigot/Bukkit)
The plugin receives the client’s mod list over a namespaced plugin messaging channel , cleans and validates it against your configurable blacklist, writes per‑join log files, and can deny access when forbidden mods are detected.
Features
Blacklist enforcement via config.yml (exact IDs + substring contains); violators are kicked with a customizable message
Per‑join logs in plugins/JRSecurity/joinlogs/… (cleaned, sorted lists)
Smart separation of “relevant mods” vs libraries/APIs for clarity
Commands
/modcheck show [player] – show cleaned mod list (self or others; others require modcheck.admin)
/modcheck last [player] – show the path of the latest saved log file
/modcheck reload – reloads config.yml
/rpcheck show [player] – show cleaned mod list (self or others; others require modcheck.admin)
/rpcheck last [player] – show the path of the latest saved log file
/rpcheck reload – reloads config.yml
Resilient to proxies (recognizes probes, has safe fallbacks)
No NMS; wide version compatibility
Compatibility
Servers: Paper/Spigot/Bukkit 1.13 – 1.21.x
Java: 17+ recommended
Quick Setup
Put the JRSecurity plugin jar into plugins/ and start the server
Adjust plugins/JRSecurity/config.yml as needed
Available Versions
How to Install JRSecurity on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set bukkit Loader
In the panel under "Egg", select the bukkit loader and matching Minecraft version (26.1.1).
Install Mod
Open the mod browser in the dashboard and search for "JRSecurity". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
26.1.1, 26.1, 1.21.11 (+13 more)
Server-side
✗ UnsupportedRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
JRSecurity server crashes on startup – what to do?
Most common cause: wrong bukkit version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (26.1.1). You can switch loaders with one click in the panel.
Is JRSecurity compatible with bukkit and fabric and paper and spigot?
JRSecurity officially supports bukkit, fabric, paper, spigot for Minecraft 26.1.1, 26.1, 1.21.11. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with JRSecurity – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if JRSecurity consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.
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Install JRSecurity with just one click on your server.