Using the Internet Safely For Seniors

Turn On a Firewall On a Mac

1. Click the System Preferencesicon.

2.In the resulting System Preferences window, click Security.

3.In the Security dialog box, click the Firewalltab (see

Figure 15-7) and choose from these settings:

• Allow All Incoming Connections:Essentially disables
  the firewall feature.


• Block All Incoming Connections:Stops any site or serv-
  ice from connecting to your computer.


• Limit Incoming Connections to Specific Services and
  Applications:Allows you to specify which services and
  applications can connect to your computer.

4.Click the Closebutton to close the dialog box and save

your settings.

Figure 15-7

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Part IV: Being Proactive