Configure firewall

Description

In this guide, you will learn how to configure a basic firewall using the firewall application UFW (uncomplicated firewall).

We are using the Linux operating system Ubuntu 24.04.

What you’ll learn
  • Install and configure UFW.
  • Set default incoming and outgoing traffic policies.
  • Allow SSH connections.
  • Enable, verify and reload the firewall.
Step by step guide
Bash
# Install UFW
apt install ufw -y

# Check firewall status
ufw status

# Set default policies
ufw default deny incoming
ufw default allow outgoing

# Allow SSH connections
ufw allow 22/tcp comment 'SSH'

# Enable the firewall
ufw --force enable

# Check firewall configuration
ufw status verbose

# Reload firewall rules
ufw reload
Next steps
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