SC-46

Requirement

Implement a policy enforcement mechanism [Selection: physically; logically] between the physical and/or network interfaces for the connecting security domains.

Discussion

For logical policy enforcement mechanisms, organizations avoid creating a logical path between interfaces to prevent the ability to bypass the policy enforcement mechanism. For physical policy enforcement mechanisms, the robustness of physical isolation afforded by the physical implementation of policy enforcement to preclude the presence of logical covert channels penetrating the security domain may be needed. Contact ncdsmo@nsa.gov for more information.

NIST 800-53A Assessment Guidance

Examine

[SELECT FROM: System and communications protection policy; procedures addressing cross-domain policy enforcement; system design documentation; system configuration settings and associated documentation; system audit records; system security plan; other relevant documents or records].

Interview

[SELECT FROM: System/network administrators; organizational personnel with information security responsibilities; organizational personnel installing, configuring, and/or maintaining the system].

Test

[SELECT FROM: Mechanisms supporting and/or implementing cross-domain policy enforcement].

ID	Assessment Objectives
SC-46	a policy enforcement mechanism is <SC-46_ODP SELECTED PARAMETER VALUE> implemented between the physical and/or network interfaces for the connecting security domains.

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