Firewalls, Network Address Translation (NAT), and network logging and accounting are all provided by Linux's Netfilter system, also known by the name of the command used to administer it, iptables. The iptables interface is the most sophisticated ever offered on Linux and makes Linux an extremely flexible system for any kind of network filtering you might do. Large sets of filtering rules can be grouped in ways that makes it easy to test them and turn them on and off. Do you watch for all types of ICMP traffic--some of them quite dangerous? Can you take advantage of stateful filtering to simplify the management of TCP connections? Would you like to track how much traffic of various types you get? This pocket reference will help you at those critical moments when someone asks you to open or close a port in a hurry, either to enable some important traffic or to block an attack. The book will keep the subtle syntax straight and help you remember all the values you have to enter in order to be as secure as possible. The listings of all iptables options are divided into those suitable for firewalling, accounting, and NAT.
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(3)Perl is a powerful interpreted programming language that has matured steadily since it first appeared in 1988. The first edition of this book, Programming Perl, hit the shelves in 1990, and was quickly adopted as the undisputed Bible of the language. Since then, Perl has grown with the times, and so has this book. Programming Perl provides a unique introduction to the Perl language and its culture, as you might expect only from its authors. This third edition of the book has been expanded to cover version 5.6 of Perl. New topics include threading, the compiler, Unicode, and other features that have been added or improved since the previous edition.
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(1)The scale of web site design has grown so that what was once
comparable to decorating a room is now comparable to designing buildings or
even cities. Designing sites so that people can find their way around is an
ever-growing challenge as sites contain more and more information. In the past, Information Architecture for the World Wide Web has helped
developers and designers establish consistent and usable structures for
their sites and their information. This edition of the classic primer on
web site design and navigation is updated with recent examples, new
scenarios, and new information on best practices. Readers will learn how to
present large volumes of information to visitors who need to find what
they're looking for quickly. With topics that range from aesthetics to
mechanics, this valuable book explains how to create interfaces that users
can understand easily.
i?{1/2}??Vincent is one of the most electrifying and flat-out fascinating Photoshop instructors out there today, and amazingly, that excitement and his brand of Photoshop magic have been captured in this book. I was blown away!i?{1/2}??
i?{1/2}?? Scott Kelby, Editor and Publisher,Photoshop User Magazine
"If you are looking for a challenge, and you want to take your Photoshop as well as your photographic skills to the next level, then I would very highly recommend Welcome To Oz."
i?{1/2}??Book review, Seatlle Post-Intelligencer (seattlepi.com)
