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win:security 6279

Network Policy Server locked the user account due to repeated failed authentication attempts.

Log source
Windows Security event log
Host type
Windows (workstation, member server, domain controller)
How to enable
Advanced Audit Policy: Logon/Logoff > Audit Network Policy Server
Audit category
Logon/Logoff
Audit subcategory
Audit Network Policy Server
Tier, host type
Recommended
Techniques
0
Rules depending on it
none

Why this tier

Microsoft Appendix L Medium; NSA

Techniques it helps detect

No ATT&CK analytic names this event. Its standing comes from the standards and rules below.

Rules that depend on it

No vendor rule names this event or source directly.

Standards and guidance naming it

RequirementRelationBasis
NSA: Recommended Windows events to forwardEvent Forwarding Guidance (RecommendedEvents.csv)Names this eventNetwork Policy: Network Policy Server Locked Account
Microsoft: Events to monitor with potential criticalityAppendix L: Events to Monitor (Windows Server AD DS best practices)Names this eventpotential criticality Medium: Network Policy Server locked the user account due to repeated failed authentication attempts.

Dataset version 0.5.3, built 2026-11-08, from public sources only. Vendor rule names, requirement text and ATT&CK content are reproduced as published; the links between them are the authors' analysis. See the references for each source, its version and its license.