Skip to content
Cybersecurity

Microsegmentation

Microsegmentation is a network security technique that divides infrastructure into small, isolated segments with individual security policies. Microsegmentation limits attacker lateral movement and is a key element of Zero Trust architecture.

What is Microsegmentation?

Microsegmentation Definition

Microsegmentation is an advanced network security technique that divides infrastructure into granular segments - down to individual workloads or applications. Each segment has its own security policies, drastically limiting an attacker’s lateral movement capabilities.

Microsegmentation vs Traditional Segmentation

Traditional segmentation (VLAN):

  • Network-level segmentation
  • IP/subnet-based boundaries
  • Coarse-grained control
  • Firewall at segment edge

Microsegmentation:

  • Workload-level segmentation
  • Application identity-based boundaries
  • Fine-grained control
  • Policies embedded in infrastructure

How Microsegmentation Works

  1. Discovery: Mapping communication between applications
  2. Classification: Grouping workloads by function
  3. Policy definition: Specifying allowed communication
  4. Enforcement: Enforcing policies at host level
  5. Monitoring: Continuous observation and alerting

Implementation Methods

  • Agent-based: Agents on hosts enforce policies
  • Network-based: SDN and virtual firewalls
  • Hypervisor-based: Policies at hypervisor level
  • Cloud-native: Security groups, NSGs in cloud

Microsegmentation Benefits

  • Limiting lateral movement: Attacker cannot spread
  • Reducing blast radius: Compromise affects only segment
  • Visibility: Full East-West traffic visibility
  • Compliance: Easier regulated environment separation
  • Zero Trust: Foundation of Zero Trust architecture

Implementation Challenges

  • Complexity: Requires accurate dependency mapping
  • Legacy applications: Difficulties with legacy apps
  • Operations: Requires continuous policy management
  • Initial effort: Time-consuming discovery and classification

Microsegmentation in Zero Trust

Microsegmentation implements a key Zero Trust principle - “never trust, always verify” for internal traffic. Instead of implicitly trusting traffic within the network, every communication is verified.

Microsegmentation is an evolution of network security, essential for protecting modern hybrid and multi-cloud environments.

Want to Reduce IT Risk and Costs?

Book a free consultation - we respond within 24h

Response in 24h Free quote No obligations

Or download free guide:

Download NIS2 Checklist