Master the fundamentals of defending modern networks, from firewall configuration and access control to intrusion detection, virtual private networks, segmentation, and centralized monitoring. This course teaches the concepts, professional workflow, and defensive reasoning behind each control, with every hands-on exercise performed in a lab you build yourself. You will finish able to design, harden, and monitor a network the way a working security engineer does.

Modules

TCP/IP Security and Threat Modeling

Lessons

• The TCP/IP Stack Through a Security Lens Preview
• Building a Network Threat Model
• Common Network Threats and Their Defenses

Firewall Rules ACLs and DMZ Design

Lessons

• How Firewalls Decide What to Allow
• Writing and Maintaining Access Control Lists
• Designing a DMZ and Segmented Zones

Intrusion Detection and Prevention

Lessons

• What IDS and IPS Systems Do
• Deploying and Tuning a Detection Engine
• Turning Alerts into Response

VPN Technologies and Encrypted Tunnels

Lessons

• How VPNs Protect Traffic in Transit
• Comparing IPSec SSL/TLS and WireGuard
• Designing Secure Remote Access

Network Segmentation and VLAN Security

Lessons

• Why Segmentation Contains Damage
• Implementing and Securing VLANs
• Microsegmentation and Modern Isolation

Security Monitoring with SIEM

Lessons

• What a SIEM Does and Why It Matters
• Designing Effective Detection Rules and Dashboards
• Building a Continuous Monitoring Practice