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IR-4(2) IR · Incident Response

Dynamic Reconfiguration

LOW MODERATE HIGH
1 Overlay 3 Related Controls
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Requirements NIST SOURCE

Include the following types of dynamic reconfiguration for [system components] as part of the incident response capability: [types of dynamic reconfiguration].

Discussion (NIST Supplemental Guidance)

Dynamic reconfiguration includes changes to router rules, access control lists, intrusion detection or prevention system parameters, and filter rules for guards or firewalls. Organizations may perform dynamic reconfiguration of systems to stop attacks, misdirect attackers, and isolate components of systems, thus limiting the extent of the damage from breaches or compromises. Organizations include specific time frames for achieving the reconfiguration of systems in the definition of the reconfiguration capability, considering the potential need for rapid response to effectively address cyber threats.

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 IR-4(2) 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. types of dynamic reconfiguration for system components are defined;
  2. system components that require dynamic reconfiguration are defined;
  3. <IR-04(02)_ODP[01] types of dynamic reconfiguration> for <IR-04(02)_ODP[02] system components> are included as part of the incident response capability.

Examine

[SELECT FROM: Incident response policy; procedures addressing incident handling; mechanisms supporting incident handling; list of system components to be dynamically reconfigured as part of incident response capability; system design documentation; system configuration settings and associated documentation; system audit records; incident response plan; system security plan; other relevant documents or records].

Interview

[SELECT FROM: Organizational personnel with incident handling responsibilities; organizational personnel with information security responsibilities].

Test

[SELECT FROM: Mechanisms that support and/or implement the dynamic reconfiguration of components as part of incident response].

Overlays

Showing the OT/ICS overlay for the parent control IR-4 — see the IR-4(2) 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)

MODERATE

  • Base control: Included (matches standard baseline)
  • Included: (1)

HIGH

  • Base control: Included (matches standard baseline)
  • Included: (1) (4) (11)

STIGs & CCIs

No STIG checks or CCI mappings are currently loaded for IR-4(2). 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

  • Incident response policy
  • incident response plan
  • system security plan

Configuration

  • system design documentation
  • system configuration settings and associated documentation

Testing

  • Mechanisms that support and/or implement the dynamic reconfiguration of components as part of incident response

Other Records

  • procedures addressing incident handling
  • mechanisms supporting incident handling
  • list of system components to be dynamically reconfigured as part of incident response capability
  • system audit records
  • other relevant documents or records