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Configuration Baselines

Defined sets of secure configuration settings that systems must conform to, serving as the known-good reference for hardening. Deviations from the baseline indicate drift or misconfiguration to correct.

A configuration baseline specifies the secure settings for a class of system, often derived from benchmarks like CIS or STIGs, and becomes the standard every such system is built and measured against. Baselines make hardening repeatable and auditable: new systems are provisioned to the baseline, and existing ones are checked for drift away from it. They are the reference point that hardening, drift detection, and configuration-as-code all revolve around.

Introduced in: System Hardening Fundamentals

Examples

  • Defining a hardened baseline for all Linux servers from a CIS Benchmark.
  • Provisioning new systems to conform to the baseline automatically.
  • Flagging a server that has drifted from its configuration baseline.