PR.PT-5: Resilience Mechanisms – NIST Cybersecurity Framework
Resilience mechanisms like failsafe, load balancing, and hot swap capabilities are critical to maintaining system availability during normal operations and adverse events. PR.PT-5 requires you to deploy these protections strategically across your infrastructure. This guide walks SMBs through practical implementation steps and evidence collection for this NIST CSF control.
What this means
PR.PT-5 mandates the implementation of engineered resilience mechanisms designed to protect system availability and continuity. Failsafe defaults ensure systems degrade safely under stress; load balancing distributes traffic to prevent single points of failure; hot swap capabilities allow component replacement without downtime. These mechanisms must function reliably in both normal operations and during adverse conditions such as attacks, hardware failures, or traffic spikes.
How to comply
- 1.Identify critical systems and components that require resilience mechanisms based on availability requirements and business impact.
- 2.Design and deploy failsafe mechanisms (e.g., safe shutdown, fail-secure defaults) for all critical systems.
- 3.Implement load balancing solutions across application and infrastructure layers to distribute demand and prevent bottlenecks.
- 4.Enable hot swap or redundant component capabilities for hardware, network links, and services to allow maintenance without service interruption.
- 5.Document all resilience mechanisms, their configurations, and failover procedures in your architecture and disaster recovery plans.
- 6.Test failover and resilience mechanisms quarterly through controlled exercises to verify they function under adverse conditions.
- 7.Monitor system performance and resilience metrics in real-time to detect degradation or mechanism failures.
- 8.Maintain playbooks for responding when resilience mechanisms activate to ensure rapid recovery.
Evidence auditors look for
- Load balancer configurations showing traffic distribution across multiple servers or cloud instances.
- Failsafe mechanism documentation and safe-state definitions for critical systems.
- Hot swap or redundancy setup diagrams (e.g., dual network interfaces, redundant power supplies, clustered databases).
- Disaster recovery and business continuity plans detailing resilience strategies.
- Test results from failover drills demonstrating mechanisms activation and service continuity.
- Monitoring dashboards or logs showing resilience metrics and failover event tracking.
- Approved change control records for deploying and updating resilience infrastructure.
- Risk assessments identifying systems requiring resilience and justifying chosen mechanisms.
Frequently asked questions
When will FAQs be available?
The FAQ for this control is currently being prepared.
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