The system must not accept ICMPv4 redirect packets on any interface.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-38524	RHEL-06-000084	SV-50325r1_rule		Medium

Description
Accepting ICMP redirects 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-43472r1_fix)
To set the runtime status of the "net.ipv4.conf.all.accept_redirects" kernel parameter, run the following command: # sysctl -w net.ipv4.conf.all.accept_redirects=0 If this is not the system's default value, add the following line to "/etc/sysctl.conf": net.ipv4.conf.all.accept_redirects = 0