PE-4 PE · Physical and Environmental Protection

Access Control for Transmission

LOW ✓ MODERATE ✓ HIGH
1 Overlay 10 Related Controls
Graph
Export ▾

Requirements NIST SOURCE

Control physical access to [system distribution and transmission lines] within organizational facilities using [security controls].

Discussion (NIST Supplemental Guidance)

Security controls applied to system distribution and transmission lines prevent accidental damage, disruption, and physical tampering. Such controls may also be necessary to prevent eavesdropping or modification of unencrypted transmissions. Security controls used to control physical access to system distribution and transmission lines include disconnected or locked spare jacks, locked wiring closets, protection of cabling by conduit or cable trays, and wiretapping sensors.

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 PE-4 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. system distribution and transmission lines requiring physical access controls are defined;
  2. security controls to be implemented to control physical access to system distribution and transmission lines within the organizational facility are defined;
  3. physical access to <PE-04_ODP[01] system distribution and transmission lines> within organizational facilities is controlled using <PE-04_ODP[02] security controls>.

Examine

[SELECT FROM: Physical and environmental protection policy; procedures addressing access control for transmission mediums; system design documentation; facility communications and wiring diagrams; list of physical security safeguards applied to system distribution and transmission lines; system security plan; other relevant documents or records].

Interview

[SELECT FROM: Organizational personnel with physical access control responsibilities; organizational personnel with information security responsibilities].

Test

[SELECT FROM: Organizational processes for access control to distribution and transmission lines; mechanisms/security safeguards supporting and/or implementing access control to distribution and transmission lines].

Overlays

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

Not applicable at this tier.

MODERATE

  • Base control: Included (matches standard baseline)

HIGH

  • Base control: Included (matches standard baseline)

STIGs & CCIs

No STIG checks or CCI mappings are currently loaded for PE-4. 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

  • Physical and environmental protection policy
  • system security plan

Configuration

  • system design documentation

Testing

  • Organizational processes for access control to distribution and transmission lines
  • mechanisms/security safeguards supporting and/or implementing access control to distribution and transmission lines

Other Records

  • procedures addressing access control for transmission mediums
  • facility communications and wiring diagrams
  • list of physical security safeguards applied to system distribution and transmission lines
  • other relevant documents or records