NIST 800-171 · Access Control
Requirement 3.1.20
- SPRS weight
- SPRS weight: 1
- POA&M eligibility
- Not POA&M-eligible
- Assessment objectives
- 6 assessment objectives
Official requirement text
Verify and control/limit connections to and use of external systems.
Assessment objectives
Assessors don’t evaluate the requirement as one sentence; they walk these objectives one by one. Each must be met for the requirement to score.
- 3.1.20[a]connections to external systems are identified.
- 3.1.20[b]use of external systems is identified.
- 3.1.20[c]connections to external systems are verified.
- 3.1.20[d]use of external systems is verified.
- 3.1.20[e]connections to external systems are controlled/limited.
- 3.1.20[f]use of external systems is controlled/limited.
Inside Valontir, this requirement carries a full plain-English guide: what it asks in normal words, what good looks like in a small shop, the evidence an assessor accepts, the common gaps that cost points, and a plain reading of every assessment objective shown above. See it in a demo.