IT and OT integration: the risks

IT and OT are converging across almost every organisation. Production systems, sensors and machines connect to office networks, cloud services and analytics. This improves efficiency and visibility but expands the attack surface of environments not originally designed for such connectivity.

Explanation

OT controls physical processes and often uses long-lived systems that are difficult to patch. IT changes quickly and focuses on data. Integration connects both worlds through production data, cloud services and remote administration, removing their former physical separation.

Risk

A threat entering through IT, such as phishing or a compromised account, can reach OT through weak segmentation. Legacy systems, default passwords and unauthenticated protocols make exploitation easier. Impact may include downtime, quality loss and physical safety risks.

Points to check

• Legacy OT systems that are difficult to patch.
• Insufficient segmentation between IT and OT.
• Shared accounts and excessive administrative rights.
• Limited visibility into OT network traffic.
• Remote access for external maintenance providers.

Approach

Implement clear zoning and segmentation, for example using IEC 62443. Restrict external access, separate administrative accounts and deploy monitoring that understands OT traffic. Coordinate IT and OT teams, then validate controls through safety-conscious penetration testing.

Conclusion

IT and OT integration creates real value but must be designed around controlled attack paths. Thoughtful architecture provides the benefits of convergence without placing continuity and safety at unnecessary risk.

Contact

Want to understand the impact in your own environment? Contact DeepBlue Security & Intelligence at info@deepbluesecurity.nl or +31 (0) 70 290 6 290.