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Chapter 9, Administration and Automation
#81 Build a Custom Firewall Computer
HACK
• If you have any computers that need to be accessed publicly, you need
another network card for these. This card is referred to as the ORANGE
interface and also is known as the snazzily titled De-Militarized Zone
(DMZ), because it exists in a sort of no man’s land between the public
Internet and your private network.
You should install the cards you need in the computer, download the Smooth-
Wall ISO from http://www.smoothwall.org, and then burn the ISO to CD.
The next step is to boot from the CD and install the SmoothWall software.
If you cannot boot from the CD, try using the Smart Boot Manager dis-
cussed in “Give Your Computer the Boot”
[Hack #1]. If this does not work, you
can create a series of boot floppies from the files found in the images direc-
tory on the SmoothWall CD. There you’ll find two boot floppy images
called bootdiskone-x.x.img and bootdisktwo-x.x.img. Use
dd to create the
floppies (unmounting and changing the floppy between images, of course):
foo@bar:~$ dd if=bootdiskone-x.x.img of=/dev/fd0 bs=1024 conv=sync ; sync
foo@bar:~$ dd if=bootdisktwo-x.x.img of=/dev/fd0 bs=1024 conv=sync ; sync
If you need to create the floppies on a Windows system, you can use the
rawrite program (http://uranus.it.swin.edu.au/~jn/linux/rawwrite.htm) to cre-
ate the disks.
Installing SmoothWall is a fairly simple ...