Control statement
Partition the system into [Organization-defined: system components] residing in separate [Organization-defined: sc-32_odp.02] domains or environments based on [Organization-defined: circumstances for the physical or logical separation of components].
Discussion
System partitioning is part of a defense-in-depth protection strategy. Organizations determine the degree of physical separation of system components. Physical separation options include physically distinct components in separate racks in the same room, critical components in separate rooms, and geographical separation of critical components. Security categorization can guide the selection of candidates for domain partitioning. Managed interfaces restrict or prohibit network access and information flow among partitioned system components.
Organization-defined parameters
These values must be resolved through the organization’s tailoring and governance process. Bracketed parameter references in the control text identify where a decision is required.
From control text to operational evidence
Use System Partitioning as a testable risk decision. Translate the official statement into accountable people, repeatable processes, configured technology, and evidence that demonstrates the outcome over time. In this family, pay particular attention to secure architecture, boundary protection, communications protection, cryptography, and system isolation.
Implementation workflow
- Define the control boundary, responsible owner, inherited portions, and systems or processes in scope.
- Resolve each organization-defined parameter before declaring the control implemented.
- Document how the implementation satisfies every clause of the official control statement.
- Collect evidence as a normal byproduct of operation rather than only before an assessment.
- Review exceptions, changes, and monitoring results on a risk-based cadence.
Evidence examples
- network and trust-boundary diagrams
- firewall and gateway configurations
- cryptographic configuration and key records
- segmentation and isolation test results
Common failure patterns
- diagrams omit cloud and third-party paths
- encryption enabled without key governance
- flat trust zones allow unnecessary lateral movement
- boundary rules accumulate without owner review
Questions practitioners should ask
- What risk decision is this control intended to support in this system?
- Which parts are implemented locally, inherited, shared, or not applicable—and what evidence supports that decision?
- Do the documented narrative, deployed configuration, operating process, and collected evidence agree?
- What event or threshold requires the implementation to be reviewed or changed?
Assessment objectives and methods
Show the assessment objective
the system is partitioned into [Organization-defined: system components] residing in separate [Organization-defined: sc-32_odp.02] domains or environments based on [Organization-defined: circumstances for the physical or logical separation of components].
Examine
- System and communications protection policy
- procedures addressing system partitioning
- system design documentation
- system configuration settings and associated documentation
- system architecture
- list of system physical domains (or environments)
- system facility diagrams
- system network diagrams
- system security plan
- other relevant documents or records
Interview
- System/network administrators
- organizational personnel with information security responsibilities
- organizational personnel installing, configuring, and/or maintaining the system
- system developers/integrators
Test
- Mechanisms supporting and/or implementing the physical separation of system components
Related controls
These relationships come from the official OSCAL catalog. They indicate useful dependencies or context, not automatic inheritance or equivalence.
Control enhancements
Enhancements add specificity, strength, or scope to the base control. Baseline badges show explicit selections in the official SP 800-53B OSCAL profiles.
SC-32(1) — Separate Physical Domains for Privileged Functions
Partition privileged functions into separate physical domains.
Official discussion
Privileged functions that operate in a single physical domain may represent a single point of failure if that domain becomes compromised or experiences a denial of service.
Assessment objectives and methods
privileged functions are partitioned into separate physical domains.
Examine
- System and communications protection policy
- procedures addressing system partitioning
- system design documentation
- system configuration settings and associated documentation
- system architecture
- list of system physical domains (or environments)
- system facility diagrams
- system network diagrams
- system security plan
- other relevant documents or records
Interview
- System/network administrators
- organizational personnel with information security responsibilities
- organizational personnel installing, configuring, and/or maintaining the system
- system developers/integrators
Test
- Mechanisms supporting and/or implementing the physical separation of system components
Authoritative sources
Bare Metal Cyber is an independent educational publisher and is not affiliated with or endorsed by NIST. Official control requirements and interpretations remain with NIST and the responsible authorizing organization.