Configure the RAS so that communications sessions are limited to single-line operation where sessions are not multiplexed across multiple lines.

Part of SRC-RAS-060 Single-line operation

Associated with IA controls: ECSC-1

SV-22011r2_rule Configure the RAS so that communications sessions are limited to single-line operation where sessions are not multiplexed across multiple lines.

Vulnerability discussion

Use of several lines per session make it difficult to monitor and audit communications events that may adversely impact the network.

Check content

Inspect the configuration of the RAS dial-up lines by using the RAS configuration screens. Verify the modem lines are configured for single line operation and multiplexing is not selected as an option available to the user or the system.

Fix text

Ensure that all modem lines are restricted to single line operation.

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