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-220998
RULE ID: SV-220998r856403

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/26260

Item Details

Category: SYSTEM AND COMMUNICATIONS PROTECTION

References: 800-53|SC-5, CAT|II, CCI|CCI-002385, Rule-ID|SV-220998r856403_rule, STIG-ID|CISC-RT-000150, Vuln-ID|V-220998

Plugin: Cisco

Control ID: 52fe8dccb092c050716b44d43dfe10c961ea0e082bf2bedebf85bd9eb8b4d3ab