Introduction
This article addresses the evaluation of IT and operational system security in the face of the NIS 2 directive. OperaMetrix proposes a structured approach in 11 key areas:
1. Asset Inventory
Map all connected equipment, including sensors and PLCs.
2. Risk Analysis
Use recognized methodologies (NIST RMF, ISO 31000) to identify threats and attack paths.
3. Physical Security
Strengthen access control to critical rooms and implement surveillance.
4. System Hardening
Apply hardening guides (CIS, ANSSI, IEC 62443) and disable non-essential services.
5. Update Management
Establish a patch process compatible with operational constraints.
6. Access Management
Implement strong authentication (MFA) and the principle of least privilege.
7. Advanced Monitoring
Deploy SIEM, IDS/IPS, and establish a SOC.
8. Network Segmentation
Implement Zero Trust model with firewalls and VLANs.
9. Incident Response Plan
Define precise procedures and organize simulation exercises.
10. Regulatory Compliance
Regularly audit against ISO 27001, IEC 62443, NIST, and NIS 2.
11. Training and Penetration Testing
Raise team awareness and perform regular tests.
Conclusion
Evaluating your IT/OT systems security is essential to protect your critical infrastructure. OperaMetrix supports you in implementing these recommendations to ensure compliance and resilience.