The system must not send IPv4 ICMP redirects.

From AIX 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE

Associated with IA controls: ECSC-1

Associated with: CCI-001551

SV-38802r1_rule The system must not send IPv4 ICMP redirects.

Vulnerability discussion

ICMP redirect messages are used by routers to inform hosts 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.

Check content

# /usr/sbin/no -o ipsendredirects If the value is not 0, this is a finding.

Fix text

#/usr/sbin/no -p -o ipsendredirects=0

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