Summary
This explainer video addresses the unique security challenges facing operational technology environments in critical infrastructure. Forescout highlights that essential services like power utilities, water treatment facilities, and healthcare systems rely on specialized equipment that cannot accommodate traditional security tools such as antivirus software. These devices—ranging from MRI machines to industrial sensors and actuators—often run on legacy systems with known vulnerabilities and fragile network stacks. The video explains Forescout's approach to OT security, which combines passive discovery to identify devices and their communication patterns with selective active probing for deeper inspection. This methodology enables organizations to understand their complete OT asset inventory, map device relationships across the Purdue model from level zero sensors through control workstations, and implement network segmentation to isolate vulnerable devices from unnecessary services. The core message emphasizes that visibility across the entire OT stack is the foundation for effective security in environments where traditional endpoint protection simply cannot be deployed.
