Rating: 
Summary: VERY USEFUL, Must have book!
Review: I love this book! It covers everything someone needs to know about iptables and how to properly configure it for any setup. It's a great refrence to have for any machine running linux.
Rating:
Summary: The best firewalls book ever.
Review: I recommend this book to both linux and non-linux users alike. the non-linux users will learn plenty through the exquisite TCP/IP details of network trickery, policy creation, and lock down methods.Linux users will be even better off, as they can use the sample configurations and setups right off the bat. This second edition covers iptables in a readable manner unlike any other source. This is the only firewalls book a Linux user will ever need. I do suggest you pick up a general linux security book as well, because application attacks are not the subject of this book.I put this book at the top of my list.
Rating:
Summary: The best firewalls book ever.
Review: I recommend this book to both linux and non-linux users alike. the non-linux users will learn plenty through the exquisite TCP/IP details of network trickery, policy creation, and lock down methods.Linux users will be even better off, as they can use the sample configurations and setups right off the bat. This second edition covers iptables in a readable manner unlike any other source. This is the only firewalls book a Linux user will ever need. I do suggest you pick up a general linux security book as well, because application attacks are not the subject of this book.I put this book at the top of my list.
Rating: 
Summary: Poorly organized and doesn't explain concepts
Review: I thought the book started out right, with some background on IP addresses, subnets, routing, and a definition of packet filtering. It also does a fairly good job describing what ipchains is, but it never put the whole picture together for me. The book kept repeating the same basic information about ipchains and then it gave many, many examples of the different permutations of commands and parameters to use to configure ipchains. I would have rather had a complete description of the command and how best to use it along with some constructive examples.Also, the book never gave me a front to back picture of how packets flow through the firewall and are routed and filtered and in what order everything happens. I ended up resorting to the LINUX HOWTO documentation, which gave me more of what I was looking for. If you already know something about networking and Linux, I'd recommend reading the LINUX HOWTO documentation and if you're hungry for a professional-level firewall book, pick up "Building Internet Firewalls (2nd Edition)" from O'Reilly.
Rating:
Summary: The perfect firewall book
Review: I've spent countless hours digging through other linux security books trying to find firewall setup information (particularly ipchains configuration info). This book is far and away the best one I've come across. It felt like it was written specifically for me - the material was presented in just the right order, with just the right level of detail. I read about half of it in one sitting and was immediately able to debug my firewall setup afterwards. I solved my problem within minutes, and had a lot more confidence in my ability to work with ipchains. This was money well spent.
Rating:
Summary: Linux Firewalls is a godsend
Review: If you are responsible for a small Linux network, whether it be at home or work, with an always-on high-speed Internet connection, and you are not already a firewall expert, this is the first book you should read. Mr Ziegler starts off by explaining the "why's" (theory) and then proceeds to demonstrate the "how's" (practice): all in a common-sense and easily understood manner. The author's website contains an additional wealth of information for the amateur Linux network administrator. As mentioned in another review there is a script on the site that will walk the user through some questions and create a firewall script based on the answers. The website is not mentioned very prominently in the book however; just inside the outer front cover at the very lower left. A couple of other MINOR shortcomings: Maggiano's "CGI programming with Tcl" provides a better first-chapter introduction to internet communication protocols and concepts such as the "three-way handshake". Having read that previously helped me breeze through Chapter 1 of Linux Firewalls with NO questions, which may not be the case for other readers (I am perhaps additionally better prepared in that I am a professional web developer). Additionally, Ziegler makes no mention of the "ntsysv" utility, which allows the user to simply add or remove services to be started up upon booting, through a MENU interface, instead of having to manually edit scripts. This utility is incorporated into the installation routines of a couple of versions of Red Hat with which I am familiar (5.2/6.0), but NOT Mandrake, which is based on Red Hat. It was through Kabir's excellent "Red Hat Linux Administrator's Handbook" that I learned of the ntsysv utility and have begun using it after installation. Regardless, this book of Ziegler's is destined for a classic. I have over 100 computer books: if I had to get rid of all but five, this one would be a keeper.
Rating:
Summary: Brilliant !
Review: Im on a networking diploma currently, though im only 17 (from UK) and i have
a keen intrest in security esp. in the field of linux security.....
Would like to say this is the best book ive ever seen on the subject,
possibly the best book ive ever read. Its very well layed out, and is as
clear as possible considering the topic in hand. All the areas have been
covered very well, and i belive ive come away having learnt alot of valuble
information. I'll certainly be looking out for any other books by Ziegler
and / or new riders.
Ive got a whole shelf of linux and security books, but this one it taking
pride of place on it ! :-)
Rating:
Summary: Firewalls
Review: Informative book very detailed on the hows and whys was able to setup two different kinds of bastion hosts/firewall within days of reading book
Rating: 
Summary: From Firewall Dummy to Firewall Wiz
Review: Mr. Ziegler does an incredible job of explaining the fundamentals of TCP/IP and details the importance of firewalls for home, home office, and small businesses. The book is thorough and eloquent. I recommend this book to anyone who is interested in security on the Internet, especially using Linux to implement a home/home office/small business firewall with a cable modem or DSL connection. Mr. Ziegler's website is a great companion to this book, it even builds a firewall script based on questions you answer. I only wish Mr. Ziegler talked about the newer features of ipchains that are not available in ipfwadm. Overall, the book can take you from Firewall Dummy to Firewall Wiz.
Rating:
Summary: Worth it
Review: One stop shopping for ipchains configuration. The author also has an intensive web site.
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