NIST 800-171 Control 3.4.2: Security Configuration Enforcement
Security configuration enforcement ensures that all information technology products in your organization operate according to defined, hardened baselines. Without enforcement mechanisms, misconfigurations create exploitable vulnerabilities that attackers actively target. This control requires you to establish standards and actively monitor compliance across your entire IT estate.
What this means
Control 3.4.2 requires organizations to define security configuration baselines for all IT systems and enforce those settings consistently. This means identifying which configuration settings reduce risk, documenting them as organizational standards, and implementing technical controls to prevent unauthorized deviations. Configuration enforcement reduces the attack surface and ensures systems maintain their secure state throughout their lifecycle.
How to comply
- 1.Develop security configuration baselines for each category of IT product (servers, workstations, network devices, databases) aligned with industry benchmarks like CIS Controls
- 2.Document all approved configurations and the rationale for each security setting
- 3.Deploy configuration management tools to enforce baselines automatically across systems
- 4.Establish a change control process that requires approval before deviating from approved configurations
- 5.Conduct regular configuration audits to identify drift and non-compliant systems
- 6.Implement automated remediation to correct configuration deviations when possible
- 7.Maintain a current inventory of all IT products and their assigned baseline configurations
- 8.Review and update baselines at least annually or when new vulnerabilities emerge
Evidence auditors look for
- Configuration management policy and procedures document
- Approved security baseline standards for each system type
- System configuration templates and hardening guides
- Configuration management tool reports showing enforcement across systems
- Audit logs from configuration management tools documenting applied settings
- Change control records showing baseline modification approvals
- Configuration compliance scan results
- Remediation records for systems found non-compliant with baselines
- Training records for personnel responsible for maintaining configurations
Frequently asked questions
When will FAQs be available?
The FAQ for this control is currently being prepared.
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