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Books : Computing & Internet : Web Development : Web Administration : Security : Firewalls
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With more and more small-office and home computers being left connected to the Internet at all times, the owners of those machines are being faced with problems that used to confront only big operations. The authors of Firewalls for Dummies spread the message: Everyone with a cable modem, data satellite dish, or DSL connection needs a firewall now. Thankfully, though, these guys go beyond merely showing how to set up turnkey personal firewall products--too many Dummies books explain the obvious and the generally intuitive--and reveal how to set up the sorts of firewalls that protect sizable networks. By understanding these techniques, small operators can plan for growth and improve their level of protection. What's more, this book provides a serious explanation of corporate firewall products and techniques that's appropriate for people who build and maintain big systems.The authors generally steer away from showing how to configure specific firewall products, though a few of the biggies--Microsoft Internet Security and Acceleration Server, BlackICE, ZoneAlarm, and Check Point FireWall-1--get comparative overview coverage. Mostly, they favour more general firewall configuration strategies and techniques. These they explain with a lot of prose, a fair number of conceptual diagrams, and tables that sum up permission rules. This is a worthwhile read. --David Wall
Topics covered: Firewalls and the ways they can be deployed to prevent unauthorised access to computers and networks without interfering with the protected users' ability to get out to the Internet. A summary of networking fundamentals as they apply to firewalls is followed by coverage of Network Address Translation (NAT), Demilitarised Zones (DMZs) as created by multiple or even single computers, and filtering policies.
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Essential information for anyone wanting to protect Internet-connected computers from unauthorised access. Includes:- thorough discussion of security-related aspects of TCP/IP;
- step-by-step plans for setting up firewalls;
- hacking and monitoring tools the authors have built to rigorously test and maintain firewalls;
- pointers to public domain security tools on the net;
- first-hand step-by-step accounts of battles with the "Berferd" hackers; and
- practical discussions of the legal aspects of security.
--Jake Bond
- thorough discussion of security-related aspects of TCP/IP;
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In the vast and varied universe of computer books, a few stand out as the best of their subject areas. Building Internet Firewalls is one of these. It's deep, yet carefully focused, so that almost anything you might want to know about firewall strategies for protecting networks is here. Plus, there's a lot of information on the reasons we build firewalls in the first place, which is to say the security risks that come with Internet connectivity. You'll learn a great deal about Internet services and the protocols that provide them as you follow this book's recommendations for stifling attacks.If there's a shortcoming to this book, it is its lack of coverage of the turnkey firewall products that are becoming popular among homes and small office users. Emphasis here is on more complicated network defences that require careful design and setup--both design and implementation are the order of the day here. The authors carefully enumerate the threats they see in various situations, go into some detail on how those threats manifest themselves, and explain what configuration changes you can make to your perimeter defences to repulse those threats. Plenty of illustrations make points about good and bad security strategies (you want to put the routers here and here, not here or here). You'll learn a lot, no matter how much experience you have, by reading this book cover to cover. --David Wall, Amazon.com
Topics covered: Means of protecting private networks from external security threats. The authors go into detail on attackers' means of exploiting security holes in common Internet services, and show how to plug those holes or at least limit the damage that can be done through them. With coverage of Unix, Linux, and Windows NT, the authors detail their philosophies of firewall design and general security policy.
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Firewall-1 is a complex product which makes the approach taken by Essential Check Point Firewall-1 particularly welcome. Basically, the author presents a series of heavily annotated pictorial mini-tutorials which take you from installation, through configuration, management and on to troubleshooting.Each tutorial covers a specific feature, shows you how to access it within Firewall-1, what the options mean, which you can ignore under certain conditions and sensible default settings. In practice, the author goes much further, detailing the effects various settings have with and without other software, services and even product licences.
The author's advice on how to develop rule sets is welcome, nearly as much so as the detailed discussions on implementing them, which requires a reasonable understanding of how the rules will affect the user experience along with the network's security. Perhaps the most apposite section, though, covers the many supported authentication methods in Firewall-1. This is as thorough as the section on arranging secure external access to the firewall management software for sysadmins.
All in all, Essential Check Point Firewall-1 is a remarkably accessible book for anyone who has to administer Check Point's bestselling firewall solution. This is highly recommended. --Steve Patient
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A statement of the Internet security problem and some solutions to it, Firewalls: A Complete Guide, attempts to gauge the vulnerability of a typical Internet-connected network, then proceeds to show how various kinds of firewalls can reduce the threat from outside. The result is informative, and precisely the kind of resource you want to have on hand when your organisation has tasked you with figuring out what kind of firewall will do an adequate job for the smallest investments of time and money. Marcus Goncalves is known for the depth of his research and his detail-rich writing style--traits he exhibits here. You will likely find support for a good network security plan in his book.If you have never worked much with network security before, you'll be happy with (and probably terrified by) the security holes the author highlights, as well as his background information on cryptography and other security technologies. Experienced hands will be more impressed by Goncalves' roundup of commercial firewall products (including Check Point Firewall-1, Sum Microsystems SunScreen, and more than a dozen others). The product profiles are more of a features comparison than a series of how-to guides and you are left wishing for pricing information, but the profiles ought to help you decide which products to investigate more closely. --David Wall, amazon.com
Topics covered: Internet connectivity, and the security risks posed by making Internet services available to users of a secure network (including specific security risks in Java, ActiveX, and other programming architectures). There is coverage of how a firewall fits into a comprehensive security strategy, and how to select a commercial firewall package.
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Solid knowledge in firewalls isn't the exclusive domain of specialists anymore--everyone needs to know something about protecting private networks from the public Internet while keeping Internet connectivity easy. Practical Firewalls combines a solid grounding in TCP/IP firewall strategies with advice on how to use a variety of firewall software, most of it freeware and shareware for Unix variants. Microsoft Proxy Server 2.0 is explained as well, so you are covered if you prefer to work under Microsoft Windows NT.Author Terry Ogletree opens with a discussion of network theory (perhaps not needed here) and the various schools of thought regarding firewall placement. In explaining packet filtering, bastion host implementation, application gateways and proxy servers, Ogletree complements prose with good conceptual diagrams and the occasional listing of an events sequence. He uses sequences of events, for example, to contrast standard FTP with FTP under proxy service.
The conceptual material is backed with a survey of firewall products, what they do and what their relative merits are. Subsequently, several products are documented in greater detail, and you also get some advice on their proper use. The result is an excellent conceptual overview and a snapshot of the state of the art--readers walk away knowing what to expect from a firewall and understanding their responsibilities in setting one up.
You might want to supplement this book with Maximum Linux Security, an excellent Linux security text, if you use that operating system, or Building Linux and OpenBSD Firewalls for its in-depth treatment of ipchains under those systems. --David Wall
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