Critical OT Environment Strengthens DDoS and Cyber Resilience Without Impacting Real-Time Control Systems

The Challenge

A critical infrastructure operator managing power-grid-related OT systems faces highly capable threats, including state-level actors and multi-vector disruption attempts. OT networks must be protected without introducing latency that could affect real-time control systems. At the same time, regulatory obligations require specific security controls and auditability while maintaining operational continuity.

The Approach

• Conducted an OT-safe architecture assessment (including air-gapped / controlled-access environments where required)
• Mapped external communication paths, remote access methods, and likely attack surfaces
• Designed a defense-in-depth strategy aligned with relevant standards (e.g., NERC CIP where applicable)
• Defined incident response procedures tailored for OT constraints (safety, uptime, change control)

Implementation (example reference architecture)

• Introduced low-latency protection controls suitable for OT environments (on-prem / local controls where needed)
• Implemented segmentation between IT and OT networks with strict access boundaries
• Established redundant paths and failover mechanisms for critical communications
• Added protocol-aware protections for industrial control protocols (as applicable)
• Set up 24/7 monitoring and escalation procedures with OT-informed runbooks

Outcomes (representative)

• Reduced exposure of critical OT systems while preserving real-time operational requirements
• Improved detection speed and response consistency through tuned telemetry and runbooks
• Produced audit-ready evidence and control mapping to support compliance obligations
• Established a measurable baseline and roadmap for continuous resilience reinforcement