The Reference guide for IT and OT for realization of secure networks presents a holistic approach to industrial network security architecture, addressing the increasing cybersecurity risks caused by digitalization and Industrial Ethernet connectivity. It outlines how Operational Technology (OT) and Information Technology (IT) environments converge, requiring secure network design to protect industrial control systems (ICS) and critical production data.
A core principle is the Defense‑in‑Depth concept, combining network segmentation, asset management, and layered security controls to minimize vulnerabilities and prevent cyberattacks. Key measures include firewall‑based zone protection, encrypted remote access via VPN, centralized user authentication, and real‑time monitoring systems to detect anomalies and unauthorized access.
The document also emphasizes lifecycle cybersecurity management, including continuous risk assessment, policy enforcement, and employee training. Overall, it highlights the importance of integrating technical solutions with organizational processes to ensure resilient, secure, and future‑ready industrial network operations.