ModsJava
NefAuth
Java mod listed for Minecraft 1.21. Downloads from the MC Java Mods app on Android.
NefAuth - Simple Login & Register for NeoForge A lightweight, secure, and server-only authentication mod designed for NeoForge 1.21.1. Perfect for large…
⬇ Download on Modrinth
NefAuth - Simple Login & Register for NeoForge
A lightweight, secure, and server-only authentication mod designed for NeoForge 1.21.1.
Perfect for large modpacks like All the Mods (ATM) running in offline mode (online-mode=false) to prevent unauthorized access and account theft.
Features
- Server-Only: Players do not need to install this mod on their clients. Just drop it into the server's
modsfolder. - Secure Hashing: Password protection using secure hashing algorithms (no plain-text passwords stored).
- Session Management: Prevents players from moving, chatting, or executing commands before logging in.
- NeoForge Native: Built specifically for NeoForge 1.21.1, ensuring maximum compatibility without the need for buggy hybrid server jars (like Arclight/Mohist).
Commands
/register <password> <confirmPassword>- Register a new account./login <password>- Log into your account./changepassword <oldPassword> <newPassword>- Change your current password.
Installation & Setup
- Download the
.jarfile for NeoForge 1.21.1. - Place it into your server's
modsdirectory. - Restart the server.
Passwords are saved in the usernamecache.json file.
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.21.1
- 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 NefAUTH-1.21.1-1.0.0.jar — drop this file into the mods folder
- Download size: 18 KB
- Download link checked 29 Oct 2026 — working
These come from our own check of the pack file, not from the source page.