Firewalls and Internet security : repelling the wily hacker

The best-selling first edition of Firewalls and Internet Security became the bible of Internet security by showing readers how to think about threats and solutions. The completely updated and expanded second edition defines the security problems companies face in today's Internet, identifies the weaknesses of the most popular security technologies, and illustrates the ins and outs of deploying an effective firewall. Readers learn how to plan and execute a security strategy that allows easy access to Internet services while defeating even the wiliest of hackers.Firewalls and Internet Security, Second Edition, draws upon the authors' experiences as researchers in the forefront of their field since the beginning of the Internet explosion.The book begins with an introduction to their philosophy of Internet security. It progresses quickly to a dissection of possible attacks on hosts and networks and descriptions of the tools and techniques used to perpetrate these attacks and to prevent them. The focus then shifts to firewalls and virtual private networks (VPNs), providing a step-by-step guide to firewall deployment. Readers are immersed in the real-world practices of Internet security through an examination of problems and practices on today's intranets and discussions of the deployment of a hacking-resistant host and of intrusion detection systems (IDS). The authors scrutinize secure communications over insecure networks and conclude with their predictions for the future of firewalls and Internet security. Appendices provide an introduction to cryptography and a list of resources readers can rely on to track further developments in Internet security. The book's Website will update these resources. Armed with the authors' hard-won knowledge of how to fight off hackers, readers of Firewalls and Internet Security, Second Edition, can make the security decisions that will make the Internet - and their computers - safer.

The best-selling first edition of Firewalls and Internet Security became the bible of Internet security by showing a generation of Internet security experts how to think about threats and solutions. This completely updated and expanded second edition defines the security problems companies face in today's Internet, identifies the weaknesses in the most popular security technologies, and illustrates the ins and outs of deploying an effective firewall. Readers will learn how to plan and execute a security strategy that allows easy access to Internet services while defeating even the wiliest of hackers.

Firewalls and Internet Security, Second Edition, draws upon the authors' experiences as researchers in the forefront of their field since the beginning of the Internet explosion.

The book begins with an introduction to their philosophy of Internet security. It progresses quickly to a dissection of possible attacks on hosts and networks and describes the tools and techniques used to perpetrate--and prevent--such attacks. The focus then shifts to firewalls and virtual private networks (VPNs), providing a step-by-step guide to firewall deployment. Readers are immersed in the real-world practices of Internet security through a critical examination of problems and practices on today's intranets, as well as discussions of the deployment of a hacking-resistant host and of intrusion detection systems (IDS). The authors scrutinize secure communications over insecure networks and conclude with their predictions about the future of firewalls and Internet security.

The book's appendixes provide an introduction to cryptography and a list of resources (also posted to the book's Web site) that readers can rely on for tracking further security developments.

Armed with the authors' hard-won knowledge of how to fight off hackers, readers of Firewalls and Internet Security, Second Edition, can make security decisions that will make the Internet--and their computers--safer.

020163466XB01302003

These authors are both well-known senior researchers at AT&T Bell Labs, and this book is based on their actual experiences maintaining, improving, and redesigning AT&T's Internet gateway. They show why the most popular technologies for keeping intruders out are insufficient, while providing a step-by-step guide to their solution--building firewall gateways.

The best-selling first edition of Firewalls and Internet Security became the bible of Internet security by showing a generation of Internet security experts how to think about threats and solutions. This completely updated and expanded second edition defines the security problems companies face in today's Internet, identifies the weaknesses in the most popular security technologies, and illustrates the ins and outs of deploying an effective firewall. Readers will learn how to plan and execute a security strategy that allows easy access to Internet services while defeating even the wiliest of hackers. Firewalls and Internet Security, Second Edition, draws upon the authors' experiences as researchers in the forefront of their field since the beginning of the Internet explosion. The book begins with an introduction to their philosophy of Internet security. It progresses quickly to a dissection of possible attacks on hosts and networks and describes the tools and techniques used to perpetrate--and prevent--such attacks. The focus then shifts to firewalls and virtual private networks (VPNs), providing a step-by-step guide to firewall deployment. Readers are immersed in the real-world practices of Internet security through a critical examination of problems and practices on today's intranets, as well as discussions of the deployment of a hacking-resistant host and of intrusion detection systems (IDS). The authors scrutinize secure communications over insecure networks and conclude with their predictions about the future of firewalls and Internet security. The book's appendixes provide an introduction to cryptography and a list of resources (also posted to the book's Web site) that readers can rely on for tracking further security developments. Armed with the authors' hard-won knowledge of how to fight off hackers, readers of Firewalls and Internet Security, Second Edition, can make security decisions that will make the Internet--and their computers--safer. 020163466XB01302003 Cover 1 Contents 8 Preface to the Second Edition 14 Preface to the First Edition 18 Part I Getting Started 22 1 Introduction 24 2 A Security Review of Protocols:Lower Layers 40 3 Security Review: The Upper Layers 62 4 The Web: Threat or Menace? 94 Part II The Threats 114 5 Classes of Attacks 116 6 The Hacker's Workbench, and Other Munitions 139 Part III Safer Tools and Services 156 7 Authentication 158 8 Using Some Tools and Services 174 Part IV Firewalls and VPNs 194 9 Kinds of Firewalls 196 10 Filtering Services 218 11 Firewall Engineering 232 12 Tunneling and VPNs 254 13 Network Layout 268 14 Safe Hosts in a Hostile Environment 280 15 Intrusion Detection 299 Part VI Lessons Learned 306 16 An Evening with Berferd 308 17 The Taking of Clark 322 18 Secure Communications over Insecure Networks 334 19 Where Do We Go from Here? 350 Part VII Appendixes 353 Appendix A An Introduction to Cryptography 356 Appendix B Keeping Up 370 Bibliography 376 List of bombs 409 List of Acronyms 412 Index 418 A new edition of the classic guide to Internet security offers a step-by-step approach to planning, designing, and implementing a complete security strategy that can thwart sophisticated hackers while allowing a company easy access to their own Internet services. Original. (Intermediate) Introduces the authors' philosophy of Internet security, explores possible attacks on hosts and networks, discusses firewalls and virtual private networks, and analyzes the state of communication security