Microsegmentation and Network Policy
Replace perimeter firewalls with microsegmented zones and enforce least-privilege network access.
What is Microsegmentation?
Microsegmentation divides a network into small, isolated segments with granular access controls between them. Unlike traditional VLAN segmentation at the network boundary, microsegmentation enforces policies at the individual workload or application level.
Why Microsegmentation Matters
Once an attacker is inside a flat network, lateral movement is unconstrained. Microsegmentation limits blast radius:
- Compromised workstation cannot reach the database directly
- Each segment has minimum required communication allowed
- East-west traffic is inspected and controlled
All lessons in this course
- Zero Trust Principles and the BeyondCorp Model
- Identity and Device Verification
- Microsegmentation and Network Policy
- Continuous Validation and Monitoring