How to Set Up a Firewall with UFW on Ubuntu

Introduction

UFW (Uncomplicated Firewall) is a user-friendly interface for managing iptables firewall rules on Ubuntu. In this guide, we'll walk through the steps to set up a firewall with UFW on Ubuntu.

Prerequisites

Before proceeding, ensure you have:

1. An Ubuntu server
2. SSH access to your Ubuntu server

Steps to Set Up a Firewall with UFW

1. Install UFW: UFW is installed by default on Ubuntu, but you can install it if it's not already installed:

sudo apt update
sudo apt install ufw

1. Enable UFW: Enable UFW to start managing your firewall rules:

sudo ufw enable

1. Allow SSH: Allow SSH connections so you don't get locked out of your server:

sudo ufw allow ssh

1. Allow Other Services: Allow other services you want to access:

sudo ufw allow http
sudo ufw allow https

1. Check UFW Status: Check the status of UFW to verify your rules:

sudo ufw status

Conclusion

Congratulations! You have successfully set up a firewall with UFW on your Ubuntu server. You can now manage your firewall rules using UFW and secure your server.