The Cisco switch must be configured to have all inactive layer 3 interfaces disabled.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| low | V-221076 | SRG-NET-000019-RTR-000007 | CISC-RT-000060 | SV-221076r999685_rule | 2024-12-20 | 3 |
| 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 switch 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. |
| ℹ️ Check |
|---|
| Review the switch configuration and verify that inactive interfaces have been disabled as shown below: interface Ethernet4/12 shutdown no switchport interface Ethernet4/13 shutdown no switchport … … … interface Ethernet4/48 shutdown no switchport If an interface is not being used but is configured or enabled, this is a finding. |
| ✔️ Fix |
|---|
| Disable all inactive interfaces as shown below: SW1(config)# int e4/1 - 11 SW1(config-if-range)# shutdown SW1(config-if-range)# end |