AC-20(4)—Use of External Systems | Network Accessible Storage Devices -- Prohibited Use
IL6
>Control Description
Prohibit the use of ⚙organization-defined network accessible storage devices in external systems.
>DoD Impact Level Requirements
No specific parameter values or requirements for this impact level.
>Discussion
Network-accessible storage devices in external systems include online storage devices in public, hybrid, or community cloud-based systems.
>Assessment Interview Topics
Questions assessors commonly ask
Process & Governance:
- •What formal policies and procedures govern the implementation of AC-20(4) (Network Accessible Storage Devices -- Prohibited Use)?
- •Who are the designated roles responsible for implementing, maintaining, and monitoring AC-20(4)?
- •How frequently is the AC-20(4) policy reviewed and updated, and what triggers policy changes?
- •What training or awareness programs ensure personnel understand their responsibilities related to AC-20(4)?
Technical Implementation:
- •Describe the specific technical mechanisms or controls used to enforce AC-20(4) requirements.
- •What automated tools, systems, or technologies are deployed to implement AC-20(4)?
- •How is AC-20(4) integrated into your system architecture and overall security posture?
- •What configuration settings, parameters, or technical specifications enforce AC-20(4) requirements?
Evidence & Documentation:
- •What documentation demonstrates the complete implementation of AC-20(4)?
- •What audit logs, records, reports, or monitoring data validate AC-20(4) compliance?
- •Can you provide evidence of periodic reviews, assessments, or testing of AC-20(4) effectiveness?
- •What artifacts would you present during a FedRAMP assessment to demonstrate AC-20(4) compliance?
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