NIST 800-53 REV 5 • ASSESSMENT, AUTHORIZATION, AND MONITORING
CA-3(1) — Unclassified National Security System Connections
CMMC Practice Mapping
No direct CMMC mapping
NIST 800-171 Mapping
No direct NIST 800-171 mapping
Related Controls
No related controls listed
Practitioner Notes
This enhancement was incorporated into the base CA-3 control. It previously addressed connections involving unclassified national security systems specifically.
Example 1: If your unclassified system connects to a DoD network like NIPRNet, ensure you have a signed connection approval from the authorizing official on both sides.
Example 2: Use a cross-domain solution or approved boundary protection device when connecting unclassified national security systems to other networks, and document the configuration.