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AC-17(9) AC · Access Control

Disconnect or Disable Access

LOW MODERATE HIGH
1 Overlay 0 Related Controls
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Requirements NIST SOURCE

Provide the capability to disconnect or disable remote access to the system within [time period].

Discussion (NIST Supplemental Guidance)

The speed of system disconnect or disablement varies based on the criticality of missions or business functions and the need to eliminate immediate or future remote access to systems.

Implementation Guidance

Engineering Interpretation

Original engineering commentary written for this explorer — not NIST source text and not authoritative guidance.

No engineering interpretation has been authored for AC-17(9) yet. This section is architected to receive it — see the Requirements and Assessment sections above for the authoritative NIST source content in the meantime.

Assessment

NIST SP 800-53A REV 5.2.0

Assessment Objectives

  1. the time period within which to disconnect or disable remote access to the system is defined;
  2. the capability to disconnect or disable remote access to the system within <AC-17(09)_ODP time period> is provided.

Examine

[SELECT FROM: Access control policy; procedures addressing disconnecting or disabling remote access to the system; system design documentation; system configuration settings and associated documentation; security plan, system audit records; system security plan; other relevant documents or records].

Interview

[SELECT FROM: System/network administrators; organizational personnel with information security responsibilities; system developers].

Test

[SELECT FROM: Mechanisms implementing capability to disconnect or disable remote access to system].

Overlays

Showing the OT/ICS overlay for the parent control AC-17 — see the AC-17(9) entries within each baseline below.

OT/ICS Overlay SP 800-82r3

NIST SP 800-82r3 Appendix F, Table 22. Blank baseline means the control/control enhancement is not selected in that initial OT baseline.

LOW

  • Base control: Included (matches standard baseline)
  • Added: (9)

MODERATE

  • Base control: Included (matches standard baseline)
  • Included: (1) (2) (3) (4)
  • Added: (9) (10)

HIGH

  • Base control: Included (matches standard baseline)
  • Included: (1) (2) (3) (4)
  • Added: (9) (10)

STIGs & CCIs

No STIG checks or CCI mappings are currently loaded for AC-17(9). This section is architected to display, per product: STIG ID, Finding ID, Severity, Title, Description, Check, Fix, CCI, and NIST control mapping — but nothing is populated here until a real DISA STIG/CCI dataset is ingested.

Learn more about STIG/CCI integration →

Evidence

Potential Evidence — Derived

Categorized from the SP 800-53A "Examine"/"Test" artifact list above by keyword — not an authoritative NIST evidence list.

Policy

  • Access control policy
  • security plan, system audit records
  • system security plan

Configuration

  • system design documentation
  • system configuration settings and associated documentation

Testing

  • Mechanisms implementing capability to disconnect or disable remote access to system

Other Records

  • procedures addressing disconnecting or disabling remote access to the system
  • other relevant documents or records