Detections
Analytics

1.6 CISC-RT-000150

Information

The Cisco router must be configured to have Gratuitous ARP disabled on all external interfaces.

GROUP ID: V-216653
RULE ID: SV-216653r855814

A gratuitous ARP is an ARP broadcast in which the source and destination MAC addresses are the same. It is used to inform the network about a host IP address. A spoofed gratuitous ARP message can cause network mapping information to be stored incorrectly, causing network malfunction.

Solution

Disable gratuitous ARP as shown in the example below:

R5(config)#no ip gratuitous-arps

See Also

https://workbench.cisecurity.org/benchmarks/26261

Item Details

Category: SYSTEM AND COMMUNICATIONS PROTECTION

References: 800-53|SC-5, CAT|II, CCI|CCI-002385, Rule-ID|SV-216653r855814_rule, STIG-ID|CISC-RT-000150, Vuln-ID|V-216653

Plugin: Cisco

Control ID: 8e42543b0ed656f6f46ceb670b44034661a8577ff0a32235f181073d19f1c66c