18.5.9.2 Ensure 'Turn on Responder (RSPNDR) driver' is set to 'Disabled' - ProhibitRspndrOnPrivateNet

Information

This policy setting changes the operational behavior of the Responder network protocol driver.

The Responder allows a computer to participate in Link Layer Topology Discovery requests so that it can be discovered and located on the network. It also allows a computer to participate in Quality-of-Service activities such as bandwidth estimation and network health analysis.

The recommended state for this setting is: Disabled.

Rationale:

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.

Impact:

None - this is the default behavior.

Solution

To establish the recommended configuration via GP, set the following UI path to Disabled:

Computer Configuration\Policies\Administrative Templates\Network\Link-Layer Topology Discovery\Turn on Responder (RSPNDR) driver

Note: This Group Policy path is provided by the Group Policy template LinkLayerTopologyDiscovery.admx/adml that is included with all versions of the Microsoft Windows Administrative Templates.

Default Value:

Disabled. (The Responder (RSPNDR) network protocol driver is turned off.)

See Also

https://workbench.cisecurity.org/files/3784

Item Details

Category: SYSTEM AND INFORMATION INTEGRITY

References: 800-53|SI-4, CSCv7|9.2

Plugin: Windows

Control ID: a6f75dde6a505712b644a3e826d503f7b20e5f73fe8dcd403276b84b422d1f1b