CA-9: Internal System Connections

CSF v1.1 References:


  • Low
    • CA-9
  • Moderate
    • CA-9
  • High
    • CA-9

Next Version:

Control Statement

The organization:

  1. Authorizes internal connections of [Assignment: organization-defined information system components or classes of components] to the information system; and
  2. Documents, for each internal connection, the interface characteristics, security requirements, and the nature of the information communicated.

Supplemental Guidance

This control applies to connections between organizational information systems and (separate) constituent system components (i.e., intra-system connections) including, for example, system connections with mobile devices, notebook/desktop computers, printers, copiers, facsimile machines, scanners, sensors, and servers. Instead of authorizing each individual internal connection, organizations can authorize internal connections for a class of components with common characteristics and/or configurations, for example, all digital printers, scanners, and copiers with a specified processing, storage, and transmission capability or all smart phones with a specific baseline configuration.

Control Enhancements

CA-9(1): Security Compliance Checks


(Not part of any baseline)

The information system performs security compliance checks on constituent system components prior to the establishment of the internal connection.