Hardening a Public-Facing Server

The marketing department just launched a new web server on an EC2 instance. They left the front door wide open, the windows unlocked, and a giant ‘ROB ME’ sign on the lawn. Your job is to turn this digital shack into Fort Knox. You’ll build a firewall (UFW), set up guard towers that automatically banish intruders (Fail2Ban), replace the flimsy password lock with a high-tech keycard system (SSH keys), and install self-repairing walls (unattended upgrades). Let the script kiddies try their luck now.