RPSWAntiBug Session Protector: The Ultimate Security Fix for Offline-Mode Servers
The Problem: Session Hijacking & "Logged in from another location" If you run an offline-mode (cracked) Minecraft server or a BungeeCord/Velocity network without strict premium authentication, your players are at risk. A well-known exploit allows anyone to connect to your server using the username of an already online player. Because of how the Minecraft engine works, the server will immediately kick the real player with the message: "Logged in from another location". Authentication plugins (like AuthMe or nLogin) cannot prevent this because the server core drops the original connection before the password prompt even appears. This leads to item loss during combat, duplication glitches, and a terrible player experience.
The Solution: RPSWAntiBug RPSWAntiBug is a lightweight, strictly backend security patch that intercepts connections at the earliest possible network stage (AsyncPlayerPreLoginEvent). It actively monitors incoming connections and checks them against currently online players. If a duplicate username tries to connect, RPSWAntiBug instantly blocks and drops the malicious connection before the server core can process it. The real player remains online, completely unaffected and unaware of the attack.
Key Features:
Configuration & Multi-Language Support (NEW) The plugin now features a fully customizable config.yml file! You can easily toggle the plugin's language to match your community.
Note on Visuals & Screenshots: Please note: This is a strict backend network security patch. There are no in-game GUIs, commands, or visual elements. It operates silently to ensure your players' safety. The included screenshots demonstrate the server console logs and the seamless background protection in-game.
Installation Guide:
The Problem: Session Hijacking & "Logged in from another location" If you run an offline-mode (cracked) Minecraft server or a BungeeCord/Velocity network without strict premium authentication, your players are at risk. A well-known exploit allows anyone to connect to your server using the username of an already online player. Because of how the Minecraft engine works, the server will immediately kick the real player with the message: "Logged in from another location". Authentication plugins (like AuthMe or nLogin) cannot prevent this because the server core drops the original connection before the password prompt even appears. This leads to item loss during combat, duplication glitches, and a terrible player experience. The Solution: RPSWAntiBug RPSWAntiBug is a lightweight, strictly backend security patch that intercepts connections at the earliest possible network stage (AsyncPlayerPreLoginEvent). It actively monitors incoming connections and checks them against currently online players. If a duplicate username tries to connect, RPSWAntiBug instantly blocks and drops the malicious connection before the server core can process it. The real player remains online, completely unaffected and unaware of the attack. Key Features:- True Plug & Play: Drop the .jar into your plugins folder, restart, and you are fully protected.
- Backend Stealth: Works silently in the background. No TPS drops, no lag, and absolutely zero heavy performance impact.
- Perfect Compatibility: Fully compatible with major authentication plugins (AuthMe, nLogin, etc.).
- Hybrid Server Support: Tested and working seamlessly on complex hybrid cores (Youer, Mohist, Ketting, Arclight) and modded environments (NeoForge/Forge).
- Exploit Prevention: Stops session stealing, combat logging exploits, and inventory desync caused by forced kicks.
Configuration & Multi-Language Support (NEW) The plugin now features a fully customizable config.yml file! You can easily toggle the plugin's language to match your community.- Supported Languages: English (en) and Ukrainian (uk).
- The kick messages presented to the attacker and the internal console logs will automatically adapt to your selected language.
Note on Visuals & Screenshots: Please note: This is a strict backend network security patch. There are no in-game GUIs, commands, or visual elements. It operates silently to ensure your players' safety. The included screenshots demonstrate the server console logs and the seamless background protection in-game. Installation Guide:- Download the RPSWAntiBug.jar file.
- Place it into your /plugins/ directory.
- Restart your server to generate the config.yml.
- (Optional) Open the config to select your preferred language.
- Enjoy peace of mind knowing your players' sessions are secured!
