11.2. Controlling Services
To get started controlling the application layer firewall, you will first need to define the services on your computer that need filtration. For ease of use, Apple has included the most common in the Sharing System Preferences pane. To get there, open System Preferences, and go to the Sharing pane (see Figure 11-1). If the padlock icon in the bottom left-hand corner of the screen is in the locked position, click it to be able to configure settings for the Sharing preferences. To enable a service, select the box that corresponds to each service; after you've checked the box, wait for it to start. This is the quickest and easiest way to enable a service.
NOTE
If you enable services for the strict purpose of testing, ...
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