Hello, and welcome to lesson 28.
In this lesson you'll learn how to work with FirewallD, the firewall in Red Hat Enterprise
Linux since version 7, which is easy to configure.
You'll first learn how to analyze current port activity using SS.
I'll next give you an overview of how firewalling is organized, and will teach you how to set
up a basic persistent firewall configuration, which will help you open the firewall for
services that you want to allow, while disallowing access to everything else.
You'll also learn how to configure port access, and we'll have a look at some advanced FirewallD
usage examples.
At the end of this lesson you'll find a lab as well as the lab solution.