CA-3(2)—Information System Connections
Secret (P1)
Management
>Control Description
SYSTEM INTERCONNECTIONS | CLASSIFIED NATIONAL SECURITY SYSTEM CONNECTIONS The organization prohibits the direct connection of a classified, national security system to an external network without the use of ⚙organization-defined boundary protection device.
>Supplemental Guidance
Organizations typically do not have control over external networks (e.g., the Internet). Approved boundary protection devices (e.g., routers, firewalls) mediate communications (i.e., information flows) between classified national security systems and external networks. In addition, approved boundary protection devices (typically managed interface/cross-domain systems) provide information flow enforcement from information systems to external networks.
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