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The system must not process Internet Control Message Protocol [ICMP] timestamp requests.


Overview

Finding ID Version Rule ID IA Controls Severity
V-51321 OSX8-00-01220 SV-65531r1_rule Medium
Description
The system must not process Internet Control Message Protocol [ICMP] timestamp requests.
STIG Date
Apple OS X 10.8 (Mountain Lion) Workstation STIG 2015-02-10

Details

Check Text ( C-53669r1_chk )
To check if the system is configured to process ICMP timestamp requests, run the following command:

sysctl net.inet.icmp.timestamp | awk '{ print $NF }'

If the value is not set to "1", this is a finding.
Fix Text (F-56121r1_fix)
To disable ICMP timestamp responses, add the following line to /etc/sysctl.conf:

net.inet.icmp.timestamp=1