Stealth Mode must be enabled on the firewall.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-51327	OSX8-00-01245	SV-65537r1_rule		Medium

Description
Stealth Mode must be enabled on the firewall.

STIG	Date
Apple OS X 10.8 (Mountain Lion) Workstation STIG	2015-02-10

Details

Check Text ( C-53675r1_chk )
To check if the OSX firewall (not pf.conf) is running in stealth mode run the following command: sudo /usr/libexec/ApplicationFirewall/socketfilterfw --getstealthmode | awk '{ print $NF }' If the result is "Disabled", this is a finding.

Fix Text (F-56127r1_fix)
To enable the firewall stealth mode, run the following command: sudo /usr/libexec/ApplicationFirewall/socketfilterfw --setstealthmode on