Configuring a Host Firewall on Ubuntu using UFW

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Configuring a Host Firewall on Ubuntu using UFW

In this lab, we will install and configure a firewall on an Ubuntu host using UFW. We will create the firewall rules to permit only VNC, HTTP, and SSH traffic inbound to the host and permit all outbound traffic from the host.

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Lab Info

Level

Beginner

Last updated

Sep 20, 2025

Duration

15m

Challenge

Install UFW.

Run the commands sudo apt-get update and sudo apt-get install -y ufw.
Challenge

Configure the default rules to deny all inbound and permit all outbound.
Run the following commands:
- sudo ufw default deny incoming
- sudo ufw default allow outgoing
Challenge

Configure UFW to permit only VNC, HTTP, and SSH traffic to the Ubuntu host.
Run the following commands:
- sudo ufw allow 22
- sudo ufw allow 80
- sudo ufw allow 5900:5901/tcp
Challenge

Enable UFW.

Run the command sudo ufw enable.
Challenge

Install the Lighttpd web server.

Run the following command: sudo apt-get install -y lighttpd

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