The OS X firewall must have logging enabled.

From Apple OS X 10.10 (Yosemite) Workstation Security Technical Implementation Guide

Part of SRG-OS-000480

Associated with: CCI-000366

SV-74137r1_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 | grep on If the result does not show 'on', this is a finding.

Fix text

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

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