Title

Modem phone lines are not restricted to single-line operation. (Cat II impact)

Discussion

Requirement: The IAO will ensure that all modem phone lines are restricted to single-line operation without any special features such as the call forwarding capability. By restricting modem phone lines to single-line operation, the risk of unauthorized access is limited by preventing the added functions of a multi-line to be used by an unauthorized person to gain access.

Check Content

Interview the IAO and/or SA to confirm compliance through discussion, review of site policy and procedures, diagrams, documentation, configuration files, logs, records, DAA/other approvals, etc as applicable

Fix Text

Ensure that only single-line phone lines are used for modem access.

Additional Identifiers

Rule ID: SV-8476r1_rule

Vulnerability ID: V-7990

Group Title: Modem phone lines are not restricted - single-line

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.