2FA Archives - ITFROMZERO - Share tobe shared!

How to Set Up Two-Factor Authentication (2FA/MFA) for SSH on Linux with Google Authenticator

By IT From Zero November 6, 2026

A step-by-step guide to setting up two-factor authentication (2FA/MFA) for SSH on Linux using Google Authenticator with SSH keys, hardening servers against private key leaks.

Ubuntu

How to Set Up Two-Factor Authentication (2FA) for SSH on Ubuntu with Google Authenticator

By IT From Zero October 7, 2026

Step-by-step guide to setting up two-factor authentication (2FA) for SSH on Ubuntu with Google Authenticator. Combine SSH keys and TOTP codes for robust server security.

Security

Securing Sudo with 2FA: The Final Defense Against Root Hijacking

By IT From Zero September 23, 2026

Hackers have your password but not your phone? They'll be stopped in their tracks. A guide to adding a 2FA layer to sudo for ultimate root protection on Linux.

Development

Building 2FA with Node.js: Don’t Let Passwords Be Your Only Line of Defense

By IT From Zero September 3, 2026

Learn how to build a Two-Factor Authentication (2FA) system using the TOTP standard with Node.js. A detailed guide on using speakeasy and qrcode with real-world security tips.

Security

Stopping Brute-force: Deploying Authelia as SSO and 2FA for Web Systems

By IT From Zero April 6, 2026

Secure your self-hosted web systems with Authelia. A detailed guide on setting up Single Sign-On (SSO) and 2FA to effectively stop brute-force attacks.

Security

Enhancing SSH Security: A Guide to Setting Up 2FA with Google Authenticator

By IT From Zero March 9, 2026

Don't let your server be compromised by a password alone. This guide will show you how to set up a second layer of 'armor' for SSH using your phone with Google Authenticator.