I am very dissapointed with this book. If you are looking to setup a firewall/gateway Linux box and you have a cable modem/DSL, look somewhere else. This book is primarily about Samba and how to setup an internal network. There are 2 chapters regarding gateways/firewalls but they assume you are using a regular modem. The web site for the book contains no information for us cable modem folks. The Ipchains discussion was not helpful at all.Also the screen shots in Chapter 1 are very dated and do not reflect what you see when you install the distribution on the cd. Don't buy this book to learn how to install linux.