The system must ignore ICMPv4 redirect messages by default.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-38533	RHEL-06-000091	SV-50334r2_rule		Low

Description
This feature of the IPv4 protocol has few legitimate uses. It should be disabled unless it is absolutely required.

STIG	Date
Red Hat Enterprise Linux 6 Security Technical Implementation Guide	2014-06-10

Details

Check Text ( None )
None

Fix Text (F-43481r1_fix)
To set the runtime status of the "net.ipv4.conf.default.accept_redirects" kernel parameter, run the following command: # sysctl -w net.ipv4.conf.default.accept_redirects=0 If this is not the system's default value, add the following line to "/etc/sysctl.conf": net.ipv4.conf.default.accept_redirects = 0