The OS X firewall must have logging enabled.

From Apple OS X 10.11 Security Technical Implementation Guide

Associated with: CCI-000366

SV-82191r1_rule The OS X firewall must have logging enabled.

Vulnerability discussion

Firewall logging must be enabled. This ensures that malicious network activity will be logged to the system.

Check content

If HBSS is used, this is not applicable. To check if the OS X firewall has logging enabled, run the following command: /usr/libexec/ApplicationFirewall/socketfilterfw --getloggingmode | /usr/bin/grep on If the result does not show "on", this is a finding.

Fix text

To enable the firewall logging, run the following command: /usr/bin/sudo /usr/libexec/ApplicationFirewall/socketfilterfw --setloggingmode on

Pro Tips

Lavender hyperlinks in small type off to the right (of CSS class id, if you view the page source) point to globally unique URIs for each document and item. Copy the link location and paste anywhere you need to talk unambiguously about these things.

You can obtain data about documents and items in other formats. Simply provide an HTTP header Accept: text/turtle or Accept: application/rdf+xml.