part SECTION I: THE BASICS -- chapter 1 The Need for Security -- chapter 2 Understanding OSI and TCP/IP -- chapter 3 Routed and Routing Protocols -- chapter 4 Understanding Router Basics -- chapter 5 Router Management -- part SECTION II: PREVENTING UNAUTHORIZED ACCESS: NETWORKING DEVICE -- chapter 6 Implementing Non-AAA Authentication -- chapter 7 Implementing AAA Security Services -- chapter 8 Implementing AAA Authentication -- chapter 9 Implementing AAA Authorization -- chapter 10 Implementing AAA Accounting -- chapter 11 Configuring TACACS and Extended TACACS -- chapter 12 Configuring TACACS+ -- chapter 13 Configuring RADIUS -- chapter 14 Configuring Kerberos -- part SECTION III: PREVENTING UNAUTHORIZED ACCESS: NETWORKING -- chapter 15 Basic Traffic Filtering, Part 1 -- chapter 16 Basic Trafffic Filtering, Part 2 -- chapter 17 Advanced Traffic Filtering, Part 1 -- chapter 18 Advanced Traffic Filtering, Part 2 -- part SECTION IV: PREVENTING NETWORK DATA INTERCEPTION -- chapter 19 Using Encryption and IKE -- chapter 20 Configuring IPSec -- part SECTION V: PREVENTING DENIAL-OF-SERVICE -- chapter 21 Configuring Denial-of-Service Security Features -- part SECTION VI: PREVENTING FRAUDLENT ROUTE UPDATES AND OTHER UNAUTHORIZED CHANGES -- chapter 22 Configuring Neighbor Authentication and Other Security Features -- chapter Appendix A: IP Addressing -- chapter Appendix B: Subnetting -- chapter Appendix C: IP Protocol Numbers -- chapter Appendix D: Well-Known Ports and Services -- chapter Appendix E: Hacker, Cracker, Malware, and Trojan Horse Ports -- chapter Appendix F: ICMP Types and Codes -- chapter Appendix G: Determining Wildcard Mask Ranges -- part Appendix H: Logical Operations -- chapter Appendix I: Helpful Resources -- chapter Appendix J: Bibliography -- chapter Appendix K: Acronyms and Abbreviations -- chapter Appendix L: Glossary -- chapter About the Author.