Question 1

What is 2FAuth?

Accepted Answer

2FAuth is a self-hosted web application for managing two-factor authentication codes — the rotating six-digit TOTP codes you'd normally get from Google Authenticator or Authy.

Question 2

Which port does it use and what's the login?

Accepted Answer

2FAuth runs on host port 8248, mapped from the container's 8000. There's no default login — you register your own account on first visit.

Question 3

Why does the APP_KEY matter so much?

Accepted Answer

The installer generates a base64 APP_KEY that 2FAuth uses to encrypt your stored two-factor secrets. If that key is lost or changes, the stored secrets can no longer be decrypted — your backups of the data volume become useless without it.

Question 4

Is it safe to keep 2FA codes on a server?

Accepted Answer

It's a real trade-off worth thinking through. Putting seeds on a web server creates a target that didn't exist when they lived on your phone — a compromise exposes every account at once.

Question 5

Should I use this or Vaultwarden's built-in TOTP?

Accepted Answer

Vaultwarden storing TOTP beside your passwords is convenient and means one less service, but keeping both factors in one place weakens the point of having two. 2FAuth keeps them separate while still being self-hosted and browser-accessible.

🔐 Setup 2FAuth — Self-Hosted Two-Factor Code Manager

📦 Resources & Setup Scripts

Quick Install:

Tutorial Steps

1 Download the Script

2 Make it Executable

3 Run the Installer

4 Register Your Account

Ports Used

Overview

Why Use It

When You Need It

Who Should Use It

Real Use Cases

Main Features

How to Use After Installation

Security Best Practices

Ports and Firewall Notes

Backup and Maintenance

Common Mistakes

Troubleshooting

Alternatives

When Not to Use It

PrismaTechWork Professional Help

Frequently Asked Questions