Securing the Converged IT/OT Landscape
The wall between information technology (IT) and operational technology (OT) has crumbled. Factories and power grids now share the same networks that handle corporate email. This shift brings efficiency, but it also introduces serious cyber risks as tools built for office environments meet hardware that controls physical machinery.
The drivers of IT and OT integration
Digital transformation pushes companies to harvest sensor data and use predictive analytics. Cloud computing and mobile apps let engineers monitor robots from tablets in real-time. This integration isn’t just a trend; it’s a necessity for modern efficiency.
New risks in an expanded attack surface
When a programmable logic controller (PLC) connects to an ERP system, every endpoint is a potential door for hackers. Attackers can move from a laptop to a safety-critical controller, turning a digital breach into a physical disaster. OT risks differ from standard IT threats in three key ways:
- Safety impact: Malicious commands can halt production, ruin equipment, or put workers in danger.
- Legacy protocols: Many devices use old protocols like Modbus or DNP3 that lack basic authentication.
- Patching hurdles: Updating a turbine’s firmware often requires shutting down operations, so vulnerabilities stay open for months.
Visibility gaps and legacy systems
Standard security tools look for IP addresses and known malware. But OT environments often use isolated networks and static IPs hidden behind firewalls. Security teams often don’t know which devices are connected or what software they’re running. Without this visibility, setting security policies is just guesswork.
AI and emerging tech: Double-edged swords
New tech adds layers of complexity. AI-driven analytics can spot tiny anomalies in sensor data, but those same AI models can be tricked with poisoned data. Machine learning on edge devices might be manipulated to ignore a failing state. Blockchain provides solid logs for transactions, but its consensus systems can still face denial-of-service attacks. Even cloud storage, if misconfigured, can leak network maps.
Robotics, AR/VR training, and the mobile devices used by field engineers increase the number of entry points. Even a simple Bluetooth scanner can bridge a corporate Wi-Fi network to a production cell if it isn’t segmented. Software supply chains, especially those delivering firmware updates, are now high-value targets for nation-state actors.
Forescout’s approach to converged security
Forescout starts with visibility. Its platform finds every device—from servers to shop-floor robots—without needing software agents. By analyzing MAC addresses and behavior, it builds a complete inventory of IT and OT assets.
- It enforces policies at the network edge, blocking traffic based on risk scores powered by AI and machine learning.
- Cloud integration lets teams push security updates from one console to remote sites, helping mobile developers maintain secure access.
- It monitors legacy protocols like Modbus passively, turning raw data into clear alerts.
- Open APIs connect with Blockchain audit logs to record every change to a PLC.
- Continuous firmware checks help manage the long patch cycles common in OT.
Best practices for converged security
Start with a full inventory. Map every device and its communication path. Use VLANs to segment networks so a breach in the office can’t reach the factory floor. Apply least-privilege rules to people and machines. Use strong authentication for mobile devices and laptops, and encrypt all cloud data.
Use AI and machine learning for constant monitoring, but keep human experts in the loop. Use Blockchain for immutable logs where compliance is critical, especially for safety commands.
IT/OT convergence boosts productivity but blurs the line between data theft and physical damage. Legacy protocols and safety risks require a strategy that sees every device and uses AI to score risks without creating new blind spots. Forescout shows how agentless visibility and smart integration protect both data and physical operations.