Uncomplicated Firewall (UFW) is a network packet filtering application that runs on Linux servers and mostly Debian-based operating systems such as Ubuntu. UFW filters network packets based on the server interfaces, ports, and services to protect the system from internal or external security threats. To ensure improved control of a system's networking environment, use UFW to add a security layer of access to the system services. This article explains how to set up firewall policies using UFW on ......