How to Configure a Firewall with UFW on Debian 9

In this tutorial, we will show you how to install and use the UFW firewall system on a Linux VPS running Debian 9. Security is a very important thing to consider when you run your own server.

UFW (Uncomplicated Firewall) is a simple and user-friendly front-end for managing iptables firewall rules – UFW aims to provide an easy to use interface for the user, making a secure server more accessible to more users. It is specially designed for beginner users who are unfamiliar with firewall concepts.