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Nortel Business Secure Router 252 Configuration — Advanced
Appendix B
Triangle Route
The Ideal Setup
When the firewall is on, your Business Secure Router acts as a secure gateway
between your LAN and the Internet. In an ideal network topology, all incoming
and outgoing network traffic passes through the Business Secure Router to protect
your LAN against attacks.
Figure 129
Ideal Setup
The Triangle Route Problem
You can have more than one connection to the Internet (through one or more
ISPs). If an alternate gateway is on the LAN (and its IP address is in the same
subnet as the Business Secure Router LAN IP address), the triangle route (also
called asymmetrical route) problem can occur. The steps below describe the
triangle route problem.
A traffic route is a path for sending or receiving data packets between two
Ethernet devices. Some companies have more than one alternate route to one or
more ISPs. If the LAN and ISPs are in the same subnet, the triangle route problem
can occur. The steps below describe the triangle route problem.
Business Secure Router
Содержание 252
Страница 13: ...Contents 13 Nortel Business Secure Router 252 Configuration Advanced SIP Register Server 337 RTP 337 Index 341 ...
Страница 14: ...14 Contents NN47923 501 ...
Страница 20: ...20 Figures NN47923 501 ...
Страница 24: ...24 Tables NN47923 501 ...
Страница 30: ...30 Preface NN47923 501 ...
Страница 42: ...42 Chapter 1 Getting to know your Nortel Business Secure Router 252 NN47923 501 ...
Страница 48: ...48 Chapter 2 Introducing the SMT NN47923 501 SMT menus at a glance Figure 6 SMT overview ...
Страница 72: ...72 Chapter 3 WAN and Dial Backup Setup NN47923 501 ...
Страница 80: ...80 Chapter 4 LAN setup NN47923 501 ...
Страница 84: ...84 Chapter 5 Internet access NN47923 501 ...
Страница 98: ...98 Chapter 6 Remote Node setup NN47923 501 ...
Страница 102: ...102 Chapter 7 IP Static Route Setup NN47923 501 ...
Страница 130: ...130 Chapter 9 Network Address Translation NAT NN47923 501 ...
Страница 156: ...156 Chapter 12 SNMP Configuration NN47923 501 ...
Страница 178: ...178 Chapter 14 System information and diagnosis NN47923 501 ...
Страница 198: ...198 Chapter 15 Firmware and configuration file maintenance NN47923 501 ...
Страница 212: ...212 Chapter 17 Remote Management NN47923 501 ...
Страница 232: ...232 Appendix B Triangle Route NN47923 501 ...
Страница 252: ...252 Appendix D PPPoE NN47923 501 ...
Страница 256: ...256 Appendix E Hardware specifications NN47923 501 ...
Страница 266: ...266 Appendix F IP subnetting NN47923 501 ...
Страница 308: ...308 Appendix H NetBIOS filter commands NN47923 501 ...
Страница 332: ...332 Appendix K Brute force password guessing protection NN47923 501 ...