OT Security Tools

Q: What is the Purdue Model and why does it matter for OT security?

The Purdue Model defines network segmentation layers for industrial environments, from Level 0 (physical processes and sensors) through Level 5 (enterprise network). Proper segmentation according to this model prevents attackers who compromise the IT network from reaching safety-critical industrial systems. OT security tools help enforce and monitor these boundaries.

Q: How do I get visibility into OT assets I cannot scan?

OT asset discovery tools use passive network monitoring to identify devices by analyzing industrial protocol traffic without sending any packets. They parse protocols like Modbus, EtherNet/IP, and Profinet to identify device types, firmware versions, and communication patterns. Some also integrate with historian databases and engineering workstations to enrich asset inventories.

Operational technology security tools for protecting industrial control systems, SCADA networks, and critical infrastructure.

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Data verified May 2026

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OT Security Specializations

191 tools across 5 specializations · 17 free, 174 commercial

Industrial Control System Security

Industrial Control System (ICS) security solutions for protecting programmable logic controllers (PLCs), distributed control systems, and industrial automation.

Operational Technology Asset Discovery

OT asset discovery tools for identifying and inventorying industrial control systems, IoT devices, and operational technology assets.

Operational Technology Network Segmentation

OT network segmentation tools for isolating operational technology networks from IT networks and external threats.

Operational Technology Vulnerability Management

OT vulnerability assessment tools for identifying security flaws in industrial control systems and operational technology.

Supervisory Control and Data Acquisition Security

SCADA security solutions for protecting supervisory control and data acquisition systems from cyber attacks and unauthorized access.

OT Security Tools FAQ

Common questions about OT Security tools, selection guides, pricing, and comparisons.

Why can I not use IT security tools to protect OT environments?

OT environments run industrial protocols (Modbus, DNP3, OPC-UA) that IT security tools do not understand. Active scanning can crash safety-critical PLCs and SCADA systems. OT networks require passive monitoring that does not inject packets, asset discovery that understands industrial device types, and security policies that prioritize safety and availability over confidentiality. IT tools designed for TCP/IP traffic will miss OT-specific threats and potentially cause outages.

What is the Purdue Model and why does it matter for OT security?

How do I get visibility into OT assets I cannot scan?

Have more questions? Browse our categories or search for specific tools.