The system must not send IPv4 ICMP redirects.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-22417	GEN003610	SV-35038r1_rule	ECSC-1	Medium

Description
ICMP redirect messages are used by routers to inform hosts that a more direct route exists 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-36507r1_chk )
Verify the system does not send IPv4 ICMP redirect messages. # ndd -get /dev/ip ip_send_redirects If the return value/result is not 0, this is a finding.

Fix Text (F-31865r1_fix)
Configure the system to not send IPv4 ICMP redirect messages. # ndd -set /dev/ip ip_send_redirects 0 Edit /etc/rc.config.d/nddconf and add/set: TRANSPORT_NAME[x]=ip NDD_NAME[x]=ip_send_redirects NDD_VALUE[x]=0