Practical guides and illustrative OT scenarios
Plain-spoken reference materials for facility leaders, CISOs, and service contractors evaluating operational technology risk.
Illustrative Scenarios
Composite, anonymized operational scenarios illustrating common OT exposures and remediation paths.
Isolating Legacy Medical Imaging & HVAC Controls
Challenge: A regional hospital shared flat VLANs between clinical workstations, imaging modalities, and building chiller controls.
Approach: Passive discovery mapped all east-west flows without scanning devices, enabling phased zone segmentation during scheduled maintenance windows.
Securing Refrigeration Vendor Remote Access
Challenge: An ammonia refrigeration contractor used shared credentials over an always-on cellular gateway into the plant PLC network.
Approach: Replaced persistent access with brokered, MFA-enforced vendor sessions with full session logging and time-bound approval.
Hardening Multi-Site Building Automation
Challenge: Exposed BACnet controllers across multiple commercial properties created lateral entry points into tenant and corporate networks.
Approach: Deployed encrypted BACnet/SC gateways, removed direct internet exposure, and standardized contractor access policies.
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