NIS2 Logging and Monitoring Requirements: What a SIEM Must Deliver

What Monitoring Must Deliver

• Coverage of critical network and information systems (identity, endpoints, cloud, OT where relevant)
• Retention and integrity controls appropriate to investigation and supervisory sampling
• Alerting and on-call paths that create documented “awareness” timestamps
• Use cases for ransomware, privileged misuse, supply-chain anomalous admin, and availability attacks
• Exportable evidence linked to Article 21 categories

ThreatHawk Path

ThreatHawk SIEM provides correlation, detection content, and case workflows that feed CSA evidence for NIS2 programmes — including MSSP multi-tenant deployments.

How CyberSilo Helps

• Article 21 evidence map and gap tracking in CSA for NIS2
• Article 23 reporting clocks with ThreatHawk SIEM detection workflows
• Advisory scoping — contact CyberSilo

Frequently Asked Questions

Does NIS2 mandate a specific SIEM vendor?

No. It requires appropriate measures. SIEM is a common way to evidence detection and incident handling.

How long should we retain logs?

Set retention by risk, sector guidance, and investigation needs — not by a single invented EU number on a blog.

Is MDR enough without a SIEM?

MDR can satisfy monitoring if telemetry, retention, and evidence export are contractually clear — document the model.

Related NIS2 Resources

NIS2 hub · ThreatHawk · Article 21 · CSA