Mac OS X Firewall

Mac OS 10.2 and later includes built-in firewall security to protect your computer. To enable the firewall, follow the the directions below:

  1. Click on the Apple Menu, then select System Preferences.

    System Preferences
  2. On the System Preferences window, click on Sharing under Internet & Network.

     Sharing Icon
  3. Click on the Firewall tab, and click Start.

    Firewall Settings

The Allow: section displays the ports that are open for outside connections. The check boxes to the left of the port tells you whether or not a port is on. If you would like to edit or add ports to the list, click on the New or Edit button.

To turn off the firewall click the Stop button.

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