ARST-RT-000150 - The Arista router must be configured to have all inactive interfaces disabled.

Information

An inactive interface is rarely monitored or controlled and may expose a network to an undetected attack on that interface. Unauthorized personnel with access to the communication facility could gain access to a router by connecting to a configured interface that is not in use.

If an interface is no longer used, the configuration must be deleted and the interface disabled. For sub-interfaces, delete sub-interfaces that are on inactive interfaces and delete sub-interfaces that are themselves inactive. If the sub-interface is no longer necessary for authorized communications, it must be deleted.

NOTE: Nessus has provided the target output to assist in reviewing the benchmark to ensure target compliance.

Solution

Delete inactive sub-interfaces and disable and delete the configuration of any inactive ports on the router.

Deleting the sub-interface:

router(config)#no interface Ethernet8.100

Disabling the interface:

router(config)#interface Ethernet 8-10
router(config-if-Et8-10)#shutdown

Resetting the interface to the default-configuration:

router(config)#default interface Ethernet 8

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_Arista_MLS_EOS_4-2x_Y24M07_STIG.zip

Item Details

Category: ACCESS CONTROL

References: 800-53|AC-4, CAT|III, CCI|CCI-001414, Rule-ID|SV-256001r882345_rule, STIG-ID|ARST-RT-000150, Vuln-ID|V-256001

Plugin: Arista

Control ID: 50ff4cf9d9fa85b66551ce5cf68feef310f282bbc52564680cb2437cf7c926a0