Detections
Analytics

1.9 CISC-RT-000150

Warning! Audit Deprecated

This audit has been deprecated and will be removed in a future update.

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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/22581

Item Details

Category: SYSTEM AND COMMUNICATIONS PROTECTION

References: 800-53|SC-5, CAT|II, CCI|CCI-002385, CSCv7|12.4, Rule-ID|SV-221082r999691_rule, STIG-ID|CISC-RT-000150

Plugin: Cisco

Control ID: 94eb74a65ea731d27053d84440bc8ca5596bb0afe407190b36a25944ce158d36