How to Set Up a Firewall with UFW on Ubuntu 24.10

To set up a firewall with UFW (Uncomplicated Firewall) on Ubuntu 24.10, follow these steps:

Step 1 : Update the System

Before installing or configuring any packages, ensure your system is up to date.

sudo apt update && sudo apt upgrade -y

Step 2 : Install UFW

If UFW is not installed, you can install it with the following command:

sudo apt install ufw -y

Step 3 : Check the Firewall Status

Check whether UFW is active:

sudo ufw status

If it says "inactive," don't worry. You'll enable it soon.

Step 4 : Allow SSH

To prevent locking yourself out of the server when enabling the firewall, allow SSH access:

sudo ufw allow ssh

Step 5 : (Optional) Allow Additional Services

You can also allow other services like HTTP (port 80) and HTTPS (port 443).

sudo ufw allow http  
sudo ufw allow https

Step 6 : Enable UFW

Enable the firewall to apply your rules:

sudo ufw enable

You'll be prompted to confirm. Type y and press Enter.

Step 7 : Check the Firewall Status Again

After enabling UFW, verify that it is active and your rules are applied:

sudo ufw status

Congratulations! You have successfully set up a firewall with UFW on Ubuntu 24.10.