Details
A firewall minimizes the threat of unauthorized users from gaining access to your system while connected to a network or the Internet.
Solution
Perform the following to implement the prescribed state:
1. Open System Preferences
2. Select Security & Privacy
3. Select Firewall
4. Select Turn On Firewall
Alternatively:
1. Run the following command in Terminal:
defaults write /Library/Preferences/com.apple.alf globalstate – int
2. Where
1 = on for specific services
2 = on for essential services
Supportive Information
The following resource is also helpful.
This security hardening control applies to the following category of controls within NIST 800-53: System and Communications Protection.This control applies to the following type of system Unix.