Stop Leaving Your Servers Open: Hardening Linux in 5 Minutes with Ansible

Hello, World! I’m Muhammad Kamran Kabeer. As an IT Instructor and the founder of MK EduOps Solutions, I often see students and small businesses focus on "getting things to work" while completely ignoring "getting things secured."Today, I’m sharing Lab 1 from my new series: The Hardened Gateway. We will use Ansible to automate the security of a Linux server on a Dell Latitude E7440 (or any Ubuntu/Debian machine). 🛡️ Why "Default Deny"? Most people try to block "bad" ports. The professional way is to deny everything and only open what you need. This is the "Zero-Trust" mindset. 🛠️ The Automation Code Here is the Ansible block I use to secure my lab environments: YAML name: Lab 1 - The Hardened Gateway hosts: localhost become: yes tasks: name: Ensure UFW is installed apt: { name: ufw, state: present } name: Set Default Policies to DENY community.general.ufw: { state: enabled, policy: deny, direction: incoming } name: Allow Essential Traffic community.general.ufw: { rule: allow, port: "{{