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Christopher Negus

"Linux Bible, 2008 Edition: Boot up to Ubuntu, Fedora, KNOPPIX, Debian, openSUSE, and 11 Other Distributions"

distrowatch.com/dwres.php?resource=firewalls.
NOTE
490
Choosing and Installing a Linux Distribution Part III
Summary
No computer should be connected to the Internet or any public network without either being
behind a firewall or being configured as a firewall itself. All of the latest Linux systems have iptables
built right into the kernel to offer excellent firewall features (earlier Linux systems included ipchains
or ipfwadm).
Desktop Linux systems often offer simplified, graphical tools for configuring a firewall. Every Linux
system, however, enables you to use the iptables command directly to change the rules in your
running Linux system. There are also tools to save and restore your firewall rules.
Coyote Linux illustrates how a Linux distribution with many valuable features can fit on a medium
as small as a floppy disk. You stepped through the creation of the firewall floppy, booting it, and
configuring the running firewall. For your permanent home or small office firewall, there are live
CD??“based firewalls you can use, such as Devil-Linux and Sentry Firewall live CDs.
491
Running a Linux Firewall/Router 18
While KNOPPIX is probably the best-known bootable Linux distribution,
it??™s by no means the only one. In the past few years,
bootable Linux systems have gone from little more than simple,
shell-command rescue floppies to full-blown desktop, server, and security
operating systems.


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