The Cisco router must be configured to have all inactive interfaces disabled.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-216740 | CISC-RT-000060 | SV-216740r531087_rule | CCI-001414 | low |
| Description | ||||
| 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. | ||||
| STIG | Date | |||
| Cisco IOS XR Router RTR Security Technical Implementation Guide | 2024-08-22 | |||
Details
Check Text (C-216740r531087_chk)
Review the router configuration and verify that inactive interfaces have been disabled as shown below.
interface GigabitEthernet0/0/1/0
shutdown
!
interface GigabitEthernet0/0/1/1
shutdown
If an interface is not being used but is configured or enabled, this is a finding.
Fix Text (F-17970r288613_fix)
Disable all inactive interfaces as shown below.
R4(config)#interface GigabitEthernet3
R4(config-if)#shutdown
R4(config)#interface GigabitEthernet4
R4(config-if)#shutdown