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Using a firewall to protect your computer

Mac OS X includes firewall software you can use to block unwanted network communication with your computer. You can use a firewall to protect all of the services available in Mac OS X, such as Personal File Sharing, Windows Sharing, and Remote Login.

When you select a service in the Services pane of Sharing preferences, it is automatically selected in the Firewall pane. To prevent that service while the firewall is on, turn off the service in the Services pane.

To enable firewall protection for a service on your computer:

  1. Open System Preferences and click Sharing.
  2. Select the service you want to share. Firewall protection is automatically turned on for that service. Click Firewall to make sure the corresponding firewall is enabled.

    To turn off firewall protection for any service while your firewall software is turned on, turn off the service by deselecting it in the Services pane.


Last Updated: 11/2/07