Security

How to Set Up Fail2ban (Block Brute-Force Attacks)

Set up Fail2ban to auto-block brute-force attacks on SSH, Nginx, and more.

3 min read

Beginner

How to Secure an SSH Server (Complete Hardening Guide)

Secure SSH against brute-force attacks. Key auth, disable root, change port, Fail2ban, and more.

3 min read

Intermediate

SSL/TLS Explained for Beginners: HTTPS, Certificates, and Encryption

SSL/TLS in plain English. How HTTPS works, what certificates do, and how to get free certs.

4 min read

Beginner

How to Harden Your Linux Server: A Security Checklist

A practical checklist for securing Linux servers — SSH lockdown, firewall rules, auto updates, fail2ban, user management, and monitoring.

6 min read

Intermediate

Two-Factor Authentication (2FA) Explained: TOTP, SMS, and Passkeys

Understand how 2FA works, why SMS codes are weak, and how to set up secure authentication with TOTP apps, hardware keys, and passkeys.

6 min read

Beginner