The system must not respond to Internet Control Message Protocol [ICMPv4] echoes sent to a broadcast address.

From Apple OS X 10.8 (Mountain Lion) Workstation STIG

Associated with: CCI-000366

SV-65519r1_rule The system must not respond to Internet Control Message Protocol [ICMPv4] echoes sent to a broadcast address.

Vulnerability discussion

Check content

To check if the system is configured to respond to ICMP echoes, run the following command: sudo sysctl net.inet.icmp.bmcastecho | awk '{ print $NF }' If the value is not set to "1", this is a finding.

Fix text

To disable ICMP responses to broadcast traffic add the following line to /etc/sysctl.conf: net.inet.icmp.bmcastecho=1

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