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Purdue Model for OT Security: Levels, Zones and the Network Diagram

What the Purdue model is and how to draw its levels and security zones for a small plant: enterprise, IDMZ, industrial, cell/area and safety zones, with seven rules and a one-afternoon method.

IEC 62443 Zones and Conduits: How to Write a Flow Register

Write your OT segmentation down: a flow register with default deny, one row per conversation, and a zone matrix auditors can read.

How to Import a Plant Network into NetBox

A step-by-step NetBox import order for a manufacturing site, with CSV examples, zones by location, cable labels and a first-week plan.

School Network Segmentation: Zones for Students, Staff, Guests and Building Systems

How to split a school network into zones: students, staff, student records, guests and building systems, with five trust tiers, seven rules and a firewall pair as the only path between zones.

Warehouse Network Design: Zones From WMS to the Conveyor PLC

How to zone a distribution center network: business, integration DMZ, warehouse operations, handhelds, conveyor and sorter controls, and safety, with seven rules for the drawing.

PCI Network Segmentation for Retail: Drawing the Cardholder Data Zone

How to draw PCI DSS segmentation for a store: the cardholder data environment as a zone with an edge, guest Wi-Fi and store devices in their own zones, and eight rules an assessor can check.

Small Office Network Segmentation: One Firewall, Many Zones

How to split a small office network into ten zones behind one firewall: staff, phones, printers, servers, guests, cameras and network management, with six rules and a one-hour method using the floor plan.

Bank Network Segmentation: Teller, Core, Wire and Card Zones

How to zone a community bank or credit union network: teller line, wire room, card room, the core processor's router behind your firewall, ATMs and alarm boxes, with seven rules for the drawing an examiner asks for.

CJIS Compliance on a City Network: Segmenting Police From City Hall

How to zone a city or county network for the CJIS Security Policy: departments, the police wing, public Wi-Fi, partners and building systems, with the water plant drawn as a boundary and seven rules for the drawing.

Hotel Network Segmentation: The Zone Model From Guest Room to Plant Room

How to zone a hotel network: front desk, restaurant and spa payments, guest and conference Wi-Fi, door locks, building systems and the brand's connection, with who owns each zone and seven rules for the drawing.

Enterprise Network Segmentation: VRFs, Internal Firewalls and Zones at Company Scale

How to segment a corporate network past one building: VRFs as the big zones, internal firewalls where they meet, the data center routed again, and identity picking the zone, with seven rules for the drawing.

FTC Safeguards Rule for Car Dealerships: Zoning the Dealership Network

How to zone a car dealership network by following the credit file: F&I, the DMS outside your walls, the shop's diagnostic tools, the service lane and guest Wi-Fi, with six rules for the drawing the FTC Safeguards Rule needs.

Score your plant network diagram

Twenty questions written for manufacturing networks, 0 to 100, with a tier you can share.

Score your school network diagram

Twenty questions written for education networks, 0 to 100, with a tier you can share.

Score your warehouse network diagram

Twenty questions written for warehousing and logistics networks, 0 to 100, with a tier you can share.

Score your store network diagram

Twenty questions written for retail networks, 0 to 100, with a tier you can share.

Score your office network diagram

Twenty questions written for offices networks, 0 to 100, with a tier you can share.

Score your bank network diagram

Twenty questions written for banks and credit unions networks, 0 to 100, with a tier you can share.

Score your local government network diagram

Twenty questions written for local government networks, 0 to 100, with a tier you can share.

Score your hotel network diagram

Twenty questions written for hotels and hospitality networks, 0 to 100, with a tier you can share.

Score your corporate network diagram

Twenty questions written for corporate hq and multi-site networks, 0 to 100, with a tier you can share.

Score your dealership network diagram

Twenty questions written for car dealerships networks, 0 to 100, with a tier you can share.

Network data collection worksheets

Twelve worksheets for devices, VLANs, cables, flows, a cabinet walkdown, a gaps register and audit evidence, with a Plant A example.

Network diagram tips

Eighteen short rules for drawings that stay true, each with the reason behind it and an example page.