3.6.8.1 (L2) Ensure 'Turn on Mapper I/O (LLTDIO) driver' is set to 'Disabled'

Information

This policy setting changes the operational behavior of the Mapper I/O network protocol driver.

LLTDIO allows a computer to discover the topology of a network it's connected to. It also allows a computer to initiate Quality-of-Service requests such as bandwidth estimation and network health analysis.

The recommended state for this setting is: Disabled

To help protect from potentially discovering and connecting to unauthorized devices, this setting should be disabled to prevent responding to network traffic for network topology discovery.

Solution

To establish the recommended configuration via configuration profiles, set the following Settings Catalog path to Disabled

Administrative Templates\Network\Link-Layer Topology Discovery\Turn on Mapper I/O (LLTDIO) driver

Impact:

None - this is the default behavior.

See Also

https://workbench.cisecurity.org/benchmarks/16852

Item Details

Category: CONFIGURATION MANAGEMENT

References: 800-53|CM-6, CSCv7|5.1

Plugin: Windows

Control ID: 28fee963eeb981653f2488a91731904adc0cc350b3da13adf5869507bfa7df08