Detections
Analytics

1.6 CISC-RT-000150

Information

The Cisco switch must be configured to have gratuitous ARP disabled on all external interfaces.

GROUP ID: V-220431
RULE ID: SV-220431r856233

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:

SW1(config)#no ip gratuitous-arps

See Also

https://workbench.cisecurity.org/benchmarks/26601

Item Details

Category: SYSTEM AND COMMUNICATIONS PROTECTION

References: 800-53|SC-5, CCI|CCI-002385, Rule-ID|SV-220431r856233_rule, STIG-ID|CISC-RT-000150, Vuln-ID|V-220431

Plugin: Cisco

Control ID: f801ef91809ee26be5e3935ec701c753483bfa6aebfc9ab5e675aefc67c79927