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Proxy Address Resolution Protocol (Proxy ARP) must not be enabled on the system.


Overview

Finding ID Version Rule ID IA Controls Severity
V-22415 GEN003608 SV-37624r1_rule ECSC-1 Medium
Description
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.
STIG Date
Red Hat Enterprise Linux 5 Security Technical Implementation Guide 2015-09-03

Details

Check Text ( None )
None
Fix Text (F-31661r1_fix)
Configure the system to not use proxy ARP.
Edit /etc/sysctl.conf and add a setting for "net.ipv4.conf.all.proxy_arp=0" and "net.ipv4.conf.default.proxy_arp=0".
# sysctl -p