Detections
Analytics

1.9 CISC-RT-000150

Information

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

GROUP ID:V-221082
RULE ID:SV-221082r999691

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.

NOTE: Nessus has provided the target output to assist in reviewing the benchmark to ensure target compliance.

Solution

Disable Gratuitous ARP as shown in the example below:

SW1(config)# int e2/7
SW1(config-if)# no ip arp gratuitous request
SW1(config-if)# end

See Also

https://workbench.cisecurity.org/benchmarks/26426

Item Details

Category: SECURITY ASSESSMENT AND AUTHORIZATION, SYSTEM AND COMMUNICATIONS PROTECTION

References: 800-53|CA-9, 800-53|SC-5, 800-53|SC-7, 800-53|SC-7(5), CCI|CCI-002385, CSCv7|12.4, Rule-ID|SV-221082r999691_rule, STIG-ID|CISC-RT-000150, Vuln-ID|V-221082

Plugin: Cisco

Control ID: 94eb74a65ea731d27053d84440bc8ca5596bb0afe407190b36a25944ce158d36