ModsJava
AuthLock
Java mod listed for Minecraft 1.20–26.x. Downloads from the MC Java Mods app on Android.
⬇ Download on ModrinthA lightweight authentication plugin for Bukkit-based Minecraft servers.
AuthLock protects player names on offline-mode servers by requiring registration and password verification when a player's IP changes.
Features
/register <password> <password>/login <password>- IP-based session recognition
- Player freeze until authentication
- Hidden inventory during authentication
- 3-minute authentication timeout
- Passwords from 2–16 letters/numbers
- Paper, Spigot, Purpur and other Bukkit-compatible servers
- Minecraft 1.20.1–26.2
Simple, lightweight, and focused on one thing: keeping player names secure.
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.20.1, 1.20.2, 1.20.3
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
File checked by MCModsHub
- Ships as AuthLock.jar — drop this file into the mods folder
- Download size: 24 KB
- Download link checked 24 Oct 2026 — working
These come from our own check of the pack file, not from the source page.