Guide to Secure Your Self-Hosted Stacks like Nginx, SSH, & Vaultwarden with Fail2ban

If you are self-hosting services and expose them to public interfaces then you already know the anxiety of watching your server logs. The moment you expose port 22 (SSH) or 443 (HTTPS) to the internet, botnets and automated scripts begin knocking on your door. Whether they are brute-forcing your SSH credentials, probing Nginx for vulnerabilities, or trying to break into your Vaultwarden password manager, the noise is endless. You can't sit there and manually block IPs all day. You need an automated bouncer. Enter Fail2ban. Fail2ban is an intrusion prevention software framework that protects computer servers from brute-force attacks. It works by scanning log files (like /var/log/auth.log or Nginx access logs) and dynamically updating your firewall rules to ban IPs that show malicious signs. In this guide, we'll walk through setting up a robust Fail2ban configuration tailored for a modern self-hosted stack featuring SSH, Nginx, and Vaultwarden. Step 1: Installation First, let's get Fail2