
Contents
7
Nortel Business Secure Router 222 Configuration — Advanced
SUA (Single User Account) Versus NAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Applying NAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
NAT setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
Address Mapping Sets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
SUA Address Mapping Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
User-Defined Address Mapping Sets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Ordering Your Rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
Configuring a server behind NAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
General NAT examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Internet access only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Example 2: Internet access with an inside server . . . . . . . . . . . . . . . . . . . . . . . . 123
Example 3: Multiple public IP addresses with inside servers . . . . . . . . . . . . . . . 124
Configuring Trigger Port forwarding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Chapter 10
Introducing the firewall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Using SMT menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Activating the firewall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Chapter 11
Filter configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Introduction to filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Filter Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
Configuring a Filter Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
Configuring a Filter Rule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Configuring a TCP/IP Filter Rule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Configuring a Generic Filter Rule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
Example Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
Filter Types and NAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
Firewall Versus Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
Applying a Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
Applying LAN Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
Applying Remote Node Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
Содержание 222
Страница 14: ...14 Contents NN47922 501 ...
Страница 24: ...24 Tables NN47922 501 ...
Страница 30: ...30 Preface NN47922 501 ...
Страница 46: ...46 Chapter 2 Introducing the SMT NN47922 501 SMT menus at a glance Figure 6 SMT overview ...
Страница 70: ...70 Chapter 3 WAN and Dial Backup Setup NN47922 501 ...
Страница 78: ...78 Chapter 4 LAN setup NN47922 501 ...
Страница 100: ...100 Chapter 6 Remote Node setup NN47922 501 ...
Страница 104: ...104 Chapter 7 IP Static Route Setup NN47922 501 ...
Страница 132: ...132 Chapter 9 Network Address Translation NAT NN47922 501 ...
Страница 154: ...154 Chapter 11 Filter configuration NN47922 501 ...
Страница 158: ...158 Chapter 12 SNMP Configuration NN47922 501 ...
Страница 198: ...198 Chapter 15 Firmware and configuration file maintenance NN47922 501 ...
Страница 212: ...212 Chapter 17 Remote Management NN47922 501 ...
Страница 232: ...232 Appendix B Triangle Route NN47922 501 ...
Страница 252: ...252 Appendix D PPPoE NN47922 501 ...
Страница 260: ...260 Appendix F Hardware specifications NN47922 501 ...
Страница 270: ...270 Appendix G IP subnetting NN47922 501 ...
Страница 308: ...308 Appendix H Command Interpreter NN47922 501 ...
Страница 312: ...312 Appendix I NetBIOS filter commands NN47922 501 ...
Страница 336: ...336 Appendix L Brute force password guessing protection NN47922 501 ...