Mastering Network Security: Firewalls, VPNs & Zero Trust Explained
A Practical Guide for IT Students and Cybersecurity Professionals
By Sarful Hassan
Looking to launch or level up your career in cybersecurity? This all-in-one guide is your hands-on roadmap to mastering network security—from firewalls and VPNs to Zero Trust and real-world lab simulations.
Whether you're a student, SOC analyst, IT admin, or security enthusiast, this book breaks down complex topics into practical steps with crystal-clear explanations and modern tools.
🔒 What You’ll Learn:
The latest cyber threats and how to defend against them
How to deploy and configure firewalls, DMZs, and pfSense
VPN technologies: OpenVPN, WireGuard, IPSec, and beyond
Core concepts of Zero Trust and how to implement them
How to use IDS, EDR, SIEM, and ELK for advanced threat detection
Step-by-step hands-on labs to simulate real-world attacks and defenses
Career advice and certification guidance for Security+, CySA+, CISSP, and more
🚀 Why This Book Stands Out:
Lab-focused with open-source tools (no expensive software required)
Beginner-friendly and certification-aligned
Includes real case studies: SolarWinds, ransomware, and VPN misuse
Maps security concepts to modern infrastructure (cloud, hybrid, remote work)
📘 Who It's For:
IT students and cybersecurity beginners
Network and system administrators
Cybersecurity learners preparing for interviews or certifications
Professionals transitioning to Zero Trust and modern security models
By the end of this book, you'll be able to design secure networks, defend against real threats, and confidently implement Zero Trust principles using modern tools.
Secure your knowledge. Secure your future.