How To Set Up a Firewall with UFW on Debian 13

A firewall is a security system that controls inbound and outbound access to a system. On a Linux server, a firewall is a crucial component to add as a security measure. In general, a firewall can be either hardware or software that prevents unauthorized access and protects the network from threats such as malware, DDoS attacks, and hacking. UFW is an iptables front-end feature in Debian 13 that can be used to configure a firewall system. UFW filters data and creates rules about what data can enter or exit a computer system. In this guide, we will show you how to set up a firewall using UFW (Uncomplicated Firewall) on Debian 13.