OPNsense

OPNsense - The Foundations of a Professional Journey

Do you want to learn how to configure and administer an OPNsense firewall, starting with the basics and building skills you can actually put to use?

This first volume guides you through a progressive learning journey into computer networking and perimeter security, with clear explanations, practical examples, and hands-on activities.

Starting with fundamental concepts - IP addressing, subnets, DNS, DHCP, NAT, and firewalls - you will learn to understand how a network works and how to prepare a physical lab environment to install and configure OPNsense.

What you will find in this volume:

• The fundamental principles of TCP/IP networking and IP addressing.

• The role of DNS, DHCP, NAT, and firewalls in communication between networks.

• Preparing the hardware and the practical lab environment.

• Installing OPNsense and performing the initial configuration.

• First access to the WebGUI and the main administrative tasks.

• A working method focused on understanding, configuration, and verification.

Who this book is for

This book is designed for those approaching OPNsense for the first time, IT technicians who want to strengthen their knowledge, and network administrators looking for a structured, practical, and progressive learning path.

No prior experience with OPNsense is required: concepts are introduced gradually, without compromising technical accuracy.

A professional learning journey

This book represents the first step in a publishing project dedicated to OPNsense, designed to guide readers progressively from fundamental knowledge to more advanced configurations through a practical, structured approach focused on professional skills.

Start with the foundations. Build your skills. Learn to work with OPNsense.