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SC-07(26) Classified National Security System Connections

NIST SP 800-53 (controls) 5.2.0 against 5.2.0
All changes in this version
unchanged SC part of SC-7

Title

Classified National Security System Connections

Control

Prohibit the direct connection of a classified national security system to an external network without the use of [Assignment: boundary protection device].

Discussion

A direct connection is a dedicated physical or virtual connection between two or more systems. Organizations typically do not have complete control over external networks, including the Internet. Boundary protection devices (e.g., firewalls, gateways, and routers) mediate communications and information flows between classified national security systems and external networks. In addition, approved boundary protection devices (typically managed interface or cross-domain systems) provide information flow enforcement from systems to external networks.

Parameters

sc-07.26_odp: boundary protection device

Assessment objective

SC-07(26) the direct connection of classified national security system to an external network without the use of a [Assignment: boundary protection device] is prohibited.

STIG rules that implement this control 0

No followed STIG rule cites a CCI indexed to this control (CCI list 2026-07-14).