Tenable OT Security

Tenable OT Security: A Practical Guide to Deployment, Configuration, Asset Discovery, Vulnerability Management, and Operational Security examines how to deploy, configure, and operate Tenable OT Security in industrial control system (ICS) and operational technology (OT) environments.

Across power generation, manufacturing, oil and gas, water treatment, transportation, and critical infrastructure, industrial cybersecurity differs fundamentally from conventional IT security. Industrial networks contain legacy equipment, proprietary protocols, and control systems where availability, reliability, and safety are essential. Protecting these environments requires more than identifying vulnerabilities. It requires understanding how industrial systems operate.

Drawing on extensive industrial cybersecurity consulting and Tenable OT deployment experience, author Bill Johns explains the technical and operational disciplines behind effective OT security monitoring. The book places Tenable OT Security within the broader responsibilities of industrial asset management, network visibility, vulnerability assessment, engineering change control, and operational risk management.

The guide examines OT network architecture, industrial segmentation, monitoring boundaries, communication pathways, sensor placement, and deployment planning. It addresses installing and configuring Tenable OT Security around programmable logic controllers (PLCs), human-machine interfaces (HMIs), supervisory control and data acquisition (SCADA) systems, and distributed control systems (DCS).

Detailed coverage of passive network monitoring, industrial asset discovery, device identification, and communication analysis explains the challenges of incomplete visibility and uncertain asset identification. Readers learn why automatically collected information must sometimes be validated through engineering knowledge.

Additional chapters explore active querying, vulnerability identification, exposure assessment, security policy configuration, alert tuning, event investigation, and integration with established cybersecurity processes. The emphasis remains on disciplined implementation, reliable evidence, and decisions that respect industrial operating conditions.

Vulnerability management receives special attention. Identifying a vulnerable component does not necessarily justify immediate remediation. Maintenance windows, equipment compatibility, vendor support, production requirements, and safety considerations affect every decision. Effective OT vulnerability management depends on validation, risk assessment, compensating controls, documented disposition, and coordination between cybersecurity specialists and operational engineers.

Beyond deployment, the book addresses platform maintenance, configuration management, monitoring effectiveness, operational acceptance, and periodic program review. Practical appendices offer adaptable worksheets, assessment records, checklists, and investigation templates for organizations developing their own procedures.

Written for OT security engineers, ICS cybersecurity professionals, network administrators, security architects, plant engineers, consultants, and technical managers, this guide connects cybersecurity with industrial operations. It supports both new Tenable OT Security implementations and the improvement of established monitoring programs.

Industrial cybersecurity protects more than information. It safeguards the systems upon which communities, industries, and essential services depend. Every discovered asset, validated configuration, and investigated event contributes to the institutional knowledge required to protect those systems.

Explore industrial cybersecurity with technical discipline, informed curiosity, and an appreciation for the responsibility of preserving critical infrastructure for generations to come.