Individual skill
implementing-network-segmentation-for-ot
Implements OT network segmentation using VLANs, OT-aware firewalls, data diodes, and IEC 62443 zone/conduit architecture, with a traffic-baseline-driven design tool for migrating flat Purdue-model networks without disrupting operations. Use when segmenting a flat OT network into Purdue levels, deploying an IT/OT DMZ, or isolating safety instrumented systems from basic process control systems.
skills/implementing-network-segmentation-for-ot/SKILL.md
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- ai-agents Repository topic
- claude-code Repository topic
- cybersecurity Repository topic
- incident-response Repository topic
- mitre-attack Repository topic
- penetration-testing Repository topic
- red-team Repository topic
- security Repository topic
- cloud-security Repository topic
- malware-analysis Repository topic
- ot-security Declared skill tag
- ics Declared skill tag
- scada Declared skill tag
- industrial-control Declared skill tag
- iec62443 Declared skill tag
- network-segmentation Declared skill tag
- vlan Declared skill tag
- operations Derived category
- engineering Derived category
- design Derived category
- data Derived category
- security Derived category
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# Implementing Network Segmentation for OT
## When to Use
- When an OT security assessment reveals a flat network with no segmentation between Purdue levels
- When implementing IEC 62443 zone/conduit architecture after completing risk assessment (IEC 62443-3-2)
- When separating IT and OT networks as part of an IT/OT convergence security initiative
- When deploying a DMZ between corporate IT and OT to protect industrial systems from IT-originating threats
- When segmenting safety instrumented systems (SIS) from basic process control systems (BPCS)
**Do not use** for IT-only microsegmentation without OT components (see implementing-zero-trust-in-cloud), or for initial zone design without prior traffic analysis (see performing-ot-network-security-assessment first).
## Prerequisites
