[DEMO] A basic firewall with ufw

ufw (Uncomplicated Firewall) is the simplest way to manage the firewall on Ubuntu and Debian.

1. 1

   Install ufw

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   sudo apt update && sudo apt install ufw

2. 2

   Set the default policy

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   sudo ufw default deny incoming
   sudo ufw default allow outgoing

3. 3

   Allow SSH

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   sudo ufw allow OpenSSH

4. 4

   Enable it and check the status

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   sudo ufw enable
   sudo ufw status verbose

Common commands