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Networking & Firewalls for Beginners: A Hands-On Guide to pfSense, OPNsense, WireGuard & Zero Trust VPNs by Kulkarni, Vihaan

Networking & Firewalls for Beginners: A Hands-On Guide to pfSense, OPNsense, WireGuard & Zero Trust VPNs

by Vihaan Kulkarni
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Book cover type: Paperback
  • ISBN13: 9798268382327
  • Binding: Paperback
  • Subject: N/A
  • Publisher: Independently Published
  • Publisher Imprint: Independently Published
  • Publication Date:
  • Pages: 256
  • Original Price: GBP 18.54
  • Language: English
  • Edition: N/A
  • Item Weight: 599 grams
  • BISAC Subject(s): System Administration / Linux & UNIX Administration

Master the essentials of modern networking and firewalls with this hands-on beginner's guide-built around real-world tools like pfSense, OPNsense, WireGuard, and Zero Trust VPNs.

In today's world, protecting your home or business network is no longer optional-it's a necessity. But learning firewalls, VPNs, and network security can feel overwhelming if you're just starting out. This book makes it simple. Step by step, you'll learn how to design, build, secure, and validate networks using free and open-source platforms trusted by professionals worldwide.

Unlike theory-heavy textbooks, this guide is purely practical. Each chapter includes step-by-step walkthroughs, practice labs, and a capstone project, so you not only understand the concepts-you actually build them.

What You'll Learn Inside
  • Networking Foundations (for Beginners)
    Understand IP addressing, DNS, DHCP, NAT, routing vs switching, and core security protocols.
  • Firewalls Demystified
    Packet filtering, stateful inspection, NAT rules, port forwarding, and Next-Gen firewall concepts.
  • pfSense & OPNsense Made Easy
    Deploy firewalls in VirtualBox, VMware, or Proxmox; configure rules, VLANs, Multi-WAN, pfBlockerNG, Suricata, and Snort.
  • VPNs & Secure Remote Access
    Install and configure WireGuard, OpenVPN, and IPSec; compare strengths; and enable multi-user remote access.
  • Zero Trust Networking (ZTNA)
    Implement identity-based access with Tailscale, Cloudflare Tunnel, and modern Zero Trust design patterns.
  • Monitoring, Security & Automation
    Centralize logs and alerts with Grafana, Prometheus, Loki, and Wazuh. Automate with APIs and Ansible for repeatable deployments.
  • Full-Stack End-to-End Project
    Build an enterprise-style secure network from scratch: pfSense perimeter + OPNsense internal gateway + VLAN segmentation + WireGuard VPN + Zero Trust overlay + IDS/IPS + monitoring dashboards.
Who This Book Is For
  • Beginners who want to learn networking and firewalls from the ground up.
  • Homelab enthusiasts who want to secure and segment their labs with professional tools.
  • IT learners and entry-level security professionals preparing for certifications and hands-on roles.
Why This Book Stands Out
  • Purely practical: every chapter includes hands-on labs.
  • Beginner-friendly but enterprise-aware: perfect for homelabs, SMBs, or anyone building professional-grade networks.
  • Up-to-date (2025+): covers modern frameworks like Zero Trust, Tailscale, Cloudflare Tunnel, and Suricata IPS.
  • Capstone Project: put everything together in a full-stack network deployment.

Key takeaway: By the end of this book, you won't just know what networking and firewalls are-you'll have built, secured, and tested your own modern network using the same tools used in production environments.

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