ARST-RT-000510 - The Arista router must be configured to have gratuitous ARP disabled on all external interfaces.

Information

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 on all external interfaces.

Disable

interface Ethernet 2
no arp gratuitous accept

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_Arista_MLS_EOS_4-2x_Y24M07_STIG.zip

Item Details

Category: SYSTEM AND COMMUNICATIONS PROTECTION

References: 800-53|SC-5, CAT|II, CCI|CCI-002385, Rule-ID|SV-256030r882432_rule, STIG-ID|ARST-RT-000510, Vuln-ID|V-256030

Plugin: Arista

Control ID: 819d17288d93669cb8e2583eb4453454832d2feabe51a4532b3f8e9b6cae78d3