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V-277167

CAT II (Medium)

The macOS system must enable macOS Application Firewall.

Rule ID

SV-277167r1148953_rule

STIG

Apple macOS 26 (Tahoe) Security Technical Implementation Guide

Version

V1R2

CCIs

CCI-000366

Discussion

The macOS Application Firewall is the built-in firewall that comes with macOS, and it must be enabled. When the macOS Application Firewall is enabled, the flow of information within the information system and between interconnected systems will be controlled by approved authorizations.

Check Content

Verify the macOS system is configured to enable the Application Firewall with the following command:

/usr/bin/osascript -l JavaScript << EOS
$.NSUserDefaults.alloc.initWithSuiteName('com.apple.security.firewall')\
.objectForKey('EnableFirewall').js
EOS

If the result is not "true", this is a finding.

Fix Text

Configure the macOS system to enable the Application Firewall by installing the "com.apple.security.firewall" configuration profile.