The system must not send IPv6 ICMP redirects.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-22551	GEN007880	SV-26939r1_rule	ECSC-1	Medium

Description
ICMP redirect messages are used by routers to inform hosts of a more direct route existing for a particular destination. These messages contain information from the system's route table possibly revealing portions of the network topology.

STIG	Date
HP-UX 11.23 Security Technical Implementation Guide	2015-12-02

Details

Check Text ( C-27887r1_chk )
Determine if the system is configured to not send IPv6 ICMP redirect messages. # ndd -get /dev/ip6 ip6_send_redirects If the command returns 1, this is a finding.

Fix Text (F-24184r1_fix)
Configure the system to not send IPv6 ICMP redirect messages. # ndd -set /dev/ip6 ip6_send_redirects 0 Edit /etc/rc.config.d/nddconf: TRANSPORT_NAME[index]=ip6 NDD_NAME[index]=ip6_send_redirects NDD_VALUE[index]=0 Where: index is the next available integer value of the nddconf file. n is a number: either 1 to turn the feature ON or 0 to turn it OFF.