The macOS system must enable the application firewall.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-259562	SRG-OS-000480-GPOS-00232	APPL-14-005050	SV-259562r991593_rule	2024-12-04	2

Description
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.

ℹ️ Check
Verify the macOS system is configured to enable the application firewall with the following command: profile="$(/usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.security.firewall')\ .objectForKey('EnableFirewall').js EOS )" plist="$(/usr/bin/defaults read /Library/Preferences/com.apple.alf globalstate 2>/dev/null)" if [[ "$profile" == "true" ]] && [[ "$plist" =~ [1,2] ]]; then echo "true" else echo "false" fi If the result is not "true", this is a finding.

ℹ️ Check

Verify the macOS system is configured to enable the application firewall with the following command: profile="$(/usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.security.firewall')\ .objectForKey('EnableFirewall').js EOS )" plist="$(/usr/bin/defaults read /Library/Preferences/com.apple.alf globalstate 2>/dev/null)" if [[ "$profile" == "true" ]] && [[ "$plist" =~ [1,2] ]]; then echo "true" else echo "false" fi If the result is not "true", this is a finding.

✔️ Fix
Configure the macOS system to enable the application firewall with the following command: /usr/bin/defaults write /Library/Preferences/com.apple.alf globalstate -int 1