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V-216137

CAT III (Low)

The system must ignore ICMP redirect messages.

Rule ID

SV-216137r959010_rule

STIG

Solaris 11 X86 Security Technical Implementation Guide

Version

V3R5

CCIs

CCI-000366

Discussion

Ignoring ICMP redirect messages reduces the likelihood of denial of service attacks.

Check Content

Determine if ICMP redirect messages are ignored.

# ipadm show-prop -p _ignore_redirect -co current ipv4
# ipadm show-prop -p _ignore_redirect -co current ipv6

If the output of all commands is not "1", this is a finding.

Fix Text

The Network Management profile is required.

Disable ignore redirects for IPv4 and IPv6.

# pfexec ipadm set-prop -p _ignore_redirect=1 ipv4
# pfexec ipadm set-prop -p _ignore_redirect=1 ipv6