zAuth is a lightweight, secure, and highly customizable authentication plugin designed for offline-mode and Geyser/Floodgate servers. Built for performance and security, zAuth protects your players from account theft, password guessing, and session hijacking.
Whether you're running a small SMP or a large network, zAuth gives you enterprise-grade login protection with smooth UX.
🔐 Key Features ✅ Secure Login & Registration
+/register
+/login
+/changepassword
+/logout
Passwords are stored using BCrypt (industry-grade hashing).
🛡 Account Protection
Account lock after X failed attempts
Automatic unlock after configured cooldown
IP-trust system (optional)
Session manager prevents re-login abuse
Freeze players completely until authenticated
**👀 Player Visibility & Mob Safety ** Hide ALL players from each other until they login
Disable mob targeting and damage before login
Bossbar reminder
Safe login teleport location
Optional: Allow players to set /spawnlogin
🔏 Privacy Protection
Password masking in:
Chat logs
Console
Command logs
Commands like /login, /register, /changepassword NEVER reveal real passwords.
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.21, 1.21.1, 1.21.2
- 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.
- Ships as zauth-1.0-SNAPSHOT.jar — drop this file into the mods folder
- Download size: 53 KB
- Download link checked 10 Sept 2026 — working
These come from our own check of the pack file, not from the source page.