Security
Microsegmentation: the practical guide that doesn't break apps
TechLeague Editorial··8 min read
Microsegmentation fails when teams skip discovery. The first 30 days of observation matter more than the firewall you pick.
Discovery
- Map flows for 30 days before any block.
- Tag workloads by app, env, owner.
Policy model
- Default deny inside the data center.
- Allow per-service, not per-IP.
Enforcement
- Hypervisor (NSX), agent (Illumio, Guardicore) or fabric (EVPN GBP).
Rollout
- Detect mode → alert mode → enforce mode per app.
- Roll back fast if business-impacting.
Operations
- Owner reviews quarterly.
- Auto-generate policy from CMDB to avoid drift.
Train segmentation reasoning in a TechLeague tournament.