Mastering Network Security Firewalls, VPNs & Zero Trust Explained

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.