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

IT/OT integration connects business applications, analytics and remote support to systems that measure or control physical processes. The connection can improve operational efficiency but joins environments with different design priorities. IT commonly favours rapid change and confidentiality, while OT places additional emphasis on predictability, availability and safety. Integrations pass through historians, engineering workstations, remote-access services, directory services, cloud platforms and supplier networks. A fully air-gapped OT environment is therefore less common than often assumed. Security starts with a current view of assets, data flows, zones, conduits and the operational purpose of every connection.

Risk

A compromised IT identity or management system can provide a route into OT when segmentation, jump hosts and access policy are weak. Conversely, legacy OT components, shared credentials and limited logging can create a blind spot for the enterprise environment. Patching or scanning without process knowledge may affect availability or safety, while deferred maintenance leaves known vulnerabilities in place. Supplier connections and temporary remote access can become permanent trust relationships. Potential impact includes not only data loss but production interruption, quality degradation, equipment damage and unsafe process conditions.

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

DeepBlue maps processes, assets, firmware, protocols, data flows and administrative relationships together. Zones and conduits are assessed for required communication, enforcement and monitoring, using a DMZ or other boundary where operationally appropriate. Remote access receives named identities, MFA, time-bound authorisation and session logging. Testing is coordinated with asset owners and safety requirements; passive analysis, configuration review and controlled validation are preferred where active scanning creates risk. Detection and incident response are developed for both IT and OT teams, including isolation and recovery decisions. Integration benefits are retained while trust relationships become explicit and testable.

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.