Comprehensive Evaluation of OT Firewalls and Network Architecture
Evaluating OT firewalls and network architecture requires a detailed, multi-faceted approach. For OT firewalls, it's essential to assess them within the context of the current operational technology environment, adhering to industry standards, secure design principles, and compliance benchmarks. This includes scrutinizing access policies and rules for misconfigurations, redundancy, and unnecessary repetition, as well as reviewing access and deny logs and ensuring regular security updates.
Evaluating OT firewalls and network architecture requires a detailed, multi-faceted approach. For OT firewalls, it's essential to assess them within the context of the current operational technology environment, adhering to industry standards, secure design principles, and compliance benchmarks. This includes scrutinizing access policies and rules for misconfigurations, redundancy, and unnecessary repetition, as well as reviewing access and deny logs and ensuring regular security updates.
Special attention should be given to unwanted object rules and the proper implementation of DMZ isolation and network segmentation or zoning configurations. For the OT network architecture review, focus on authentication and access control, remote access, network segmentation, endpoint security, and log management. Utilize technical documents, the existing network architecture layout, and insights from OT engineers to understand the network's structure comprehensively. Integrating this information with asset inventories and network mappings visualized according to the Purdue model helps in identifying vulnerabilities, attack vectors, and misconfigurations within the network.
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