TAILIEUCHUNG - Open Source Security Tools : Practical Guide to Security Applications part 2

Open Source Security Tools : Practical Guide to Security Applications part 2. Few frontline system administrators can afford to spend all day worrying about security. But in this age of widespread virus infections, worms, and digital attacks, no one can afford to neglect network defenses. Written with the harried IT manager in mind, Open Source Security Tools is a practical, hands-on introduction to open source security tools. | Page xi Wednesday June 23 2004 10 48 PM Preface Open source software is such an integral part of the Internet that is it safe to say that the Internet wouldn t exist as we know it today without it. The Internet never would have grown as fast and as dynamically as it did without open source programs such as BIND which controls the domain name system Sendmail which powers most e-mail servers INN which runs many news servers Major Domo which runs many of the thousands of mailing lists on the Internet and of course the popular Apache Web server. One thing for sure is that the Internet is a lot cheaper due to open source software. For that you can thank the Free Software Foundation BSD UNIX Linux and Linus Torvalds and the thousands of nameless programmers who put their hard work and sweat into the programs that run today s Internet. While open source programs cover just about every aspect of computer software from complete operating systems and games to word processors and databases this book primarily deals with tools used in computer security. In the security field there are programs that address every possible angle of IT security. There are open source firewalls intrusion detection systems vulnerability scanners forensic tools and cutting-edge programs for areas such as wireless communications. There are usually multiple choices in each category of mature stable programs that compare favorably with commercial products. I have tried to choose the best of breed in each major area of information security in my opinion of course . I present them in a detailed manner showing you not just how to install and run them but also how to use them in your everyday work to have a more secure network. Using the open source software described in this book you can secure your enterprise from both internal and external security threats with a minimal cost and maximum benefit for both the company and you personally. I believe combining the concepts of information .

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