UCF STIG Viewer Logo

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


Overview

Finding ID Version Rule ID IA Controls Severity
V-51309 OSX8-00-01190 SV-65519r1_rule Medium
Description
The system must not respond to Internet Control Message Protocol [ICMPv4] echoes sent to a broadcast address.
STIG Date
Apple OS X 10.8 (Mountain Lion) Workstation STIG 2015-02-10

Details

Check Text ( C-53657r1_chk )
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 (F-56109r1_fix)
To disable ICMP responses to broadcast traffic add the following line to /etc/sysctl.conf:

net.inet.icmp.bmcastecho=1