GEN003608 - Proxy ARP must not be enabled on the system.

Information

Proxy ARP allows a system to respond to ARP requests on one interface on behalf of hosts connected to another interface. If this function is enabled when not required, addressing information may be leaked between the attached network segments.

Solution

Remove any non-local published ARP entries.
# arp -d < host >
Check system initialization scripts for any commands configuring published ARP entries (such as 'arp -s <host> <addr> pub') and remove them.

See Also

http://iasecontent.disa.mil/stigs/zip/U_STIG_Library_2015_07.zip

Item Details

Category: ACCESS CONTROL

References: 800-53|AC-4, CAT|II, CCI|CCI-001551, Rule-ID|SV-38867r1_rule, STIG-ID|GEN003608, Vuln-ID|V-22415

Plugin: Unix

Control ID: a063f74a58e72df94fcf6916ae60435da5517f6a435eb02f1965c7d6dde15b7f