Cisco ASA and PIX Firewall Handbook

This chapter refers often to topics covered in earlier chapters. If you haven't yet read them or haven't read them recently, consider refamiliarizing yourself with the following topics and chapters before continuing with this chapter:

• Using the Package Management tool to install Fedora Core 4 components, covered in Chapter 31, "Installing Linux Software."

• Using text editors to make changes to text files, covered in Chapter 5, "Working with Files on the Desktop," and Chapter 20, "Creating, Editing, and Saving Text Files"

• Using Fedora Core 4 and Linux system administration tools to enable or disable installed services for a given runlevel, covered in Chapter 28, "Command-Line System Administration," and Chapter 29, "Desktop System Administration"

• Managing the Linux firewalling configuration, including the Other ports box in the Security Level Configuration tool, covered in Chapter 30, "Security Basics"

You will find illustrations and examples in this chapter as you make use of these tools, but for in-depth discussion, refer to the chapters listed in the preceding list.

You will find that some network terminology is unavoidable when discussions of network services begin in earnest. If you are completely unfamiliar with Transmission Control Protocol/Internet Protocol (TCP/IP) networkingthe type used by Linux, Unix, and most of the Internetyou should consider keeping a TCP/IP reference of some sort handy, to help you with basic concepts and unfamiliar terms. One of the best on the Internet, with links to a number of other helpful resources, can be found in Wikipedia at:

http://en.wikipedia.org/wiki/TCP/IP