AC-4(20)

Requirement

Employ [Assignment: organization-defined solutions in approved configurations] to control the flow of [Assignment: organization-defined information] across security domains.

Discussion

Organizations define approved solutions and configurations in cross-domain policies and guidance in accordance with the types of information flows across classification boundaries. The National Security Agency (NSA) National Cross Domain Strategy and Management Office provides a listing of approved cross-domain solutions. Contact ncdsmo@nsa.gov for more information.

NIST 800-53A Assessment Guidance

Examine

[SELECT FROM: Information flow enforcement policy; information flow control policies; procedures addressing information flow enforcement; system design documentation; system configuration settings and associated documentation; list of solutions in approved configurations; approved configuration baselines; system audit records; system security plan; other relevant documents or records].

Interview

[SELECT FROM: Organizational personnel with information flow enforcement responsibilities; system/network administrators; organizational personnel with information security responsibilities].

Test

[SELECT FROM: Mechanisms implementing information flow enforcement functions].

ID	Assessment Objectives
AC-04(20)	<AC-04(20)_ODP[01] solutions in approved configurations> are employed to control the flow of <AC-04(20)_ODP[02] information> across security domains.

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