Chapter 17. Blocking Network Access: Firewalls

   

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IN THIS CHAPTER

• Firewalling

• Built-In GUI Mac OS X Firewall Tools

• Built-In Command-Line Mac OS X Firewall Tools

• Firewall Hardware

• Firewall Resources

A majority of this text (Chapters 7 “16) have dealt with network services and attacks. It stands to reason that a solution should exist for dealing with controlling network access in general ”and it does, in the form of a firewall. A firewall is a device or piece of software that blocks network packets before they can reach server daemons. Rather than managing access for individual processes, a firewall provides a central point for controlling network traffic across the board.

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