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The Arista router must be configured to have all inactive interfaces disabled.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-256001 | ARST-RT-000150 | SV-256001r882345_rule | 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 |
|---|---|
| Arista MLS EOS 4.2x Router Security Technical Implementation Guide | 2023-01-17 |
Details
| Check Text ( C-59677r882343_chk ) |
|---|
| Review the Arista router configuration. Verify the interfaces and sub-interfaces execute the commands "show ip interface brief" and "show interface status". Example of a disabled interface: interface Ethernet 8-10 description The interface is administratively shutdown shutdown If an interface is not being used but is configured or enabled, this is a finding. |
| Fix Text (F-59620r882344_fix) |
|---|
| 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 |