How to Set Up a Firewall with UFW on Ubuntu 20.04

A firewall is a tool for monitoring and filtering incoming and outgoing network traffic. It works by defining a set of security rules that determine whether to allow or block specific traffic.

Ubuntu ships with a firewall configuration tool called UFW (Uncomplicated Firewall). UFW is a user-friendly front-end for managing iptables firewall rules. Its main goal is to make managing firewall easier or, as the name says, uncomplicated.

This article describes how to use the UFW tool to configure and manage a firewall on Ubuntu 20.04. A properly configured firewall is one of the most important aspects of overall system security.

Prerequisites #

#ubuntu 20.04 #a firewall #ufw