The system must not respond to multicast echo requests.

Multicast echo requests can be useful for reconnaissance of systems and for denial of service attacks.

Determine if response to multicast echo requests is disabled.

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

If the output of all commands is not "0", this is a finding.

The Network Management profile is required.

Disable respond to echo multi-cast for IPv4 and IPv6.

# pfexec ipadm set-prop -p _respond_to_echo_multicast=0 ipv4
# pfexec ipadm set-prop -p _respond_to_echo_multicast=0 ipv6