Chapter 10 Firewalls
AMG1302-T10A User’s Guide
152
10.4.4.2 Solving the “Triangle Route” Problem
If you have the Device allow triangle route sessions, traffic from the WAN can go directly to a LAN
computer without passing through the Device and its firewall protection.
Another solution is to use IP alias. IP alias allows you to partition your network into logical sections
over the same Ethernet interface. Your Device supports up to three logical LAN interfaces with the
Device being the gateway for each logical network.
It’s like having multiple LAN networks that actually use the same physical cables and ports. By
putting your LAN and Gateway
A
in different subnets, all returning network traffic must pass
through the Device to your LAN. The following steps describe such a scenario.
1
A computer on the LAN initiates a connection by sending a SYN packet to a receiving server on the
WAN.
2
The Device
reroutes the packet to Gateway A, which is in Subnet 2.
3
The reply from the WAN goes to the Device.
4
The Device then sends it to the computer on the LAN in Subnet 1.
Figure 84
IP Alias
1
2
3
LAN
A
ISP 1
ISP 2
4
WAN
Subnet 1
Subnet 2
Summary of Contents for AMG1302-T10A
Page 4: ...Contents Overview AMG1302 T10A User s Guide 4 ...
Page 12: ...Table of Contents AMG1302 T10A User s Guide 12 ...
Page 13: ...13 PART I User s Guide ...
Page 14: ...14 ...
Page 20: ...Chapter 1 Introduction AMG1302 T10A User s Guide 20 ...
Page 52: ...Chapter 4 Tutorials AMG1302 T10A User s Guide 52 ...
Page 53: ...53 PART II Technical Reference ...
Page 54: ...54 ...
Page 126: ...Chapter 8 Wireless LAN AMG1302 T10A User s Guide 126 ...
Page 140: ...Chapter 9 Network Address Translation NAT AMG1302 T10A User s Guide 140 ...
Page 158: ...Chapter 11 Filters AMG1302 T10A User s Guide 158 ...
Page 162: ...Chapter 12 Static Route AMG1302 T10A User s Guide 162 ...
Page 166: ...Chapter 13 Port Binding AMG1302 T10A User s Guide 166 ...
Page 176: ...Chapter 15 Quality of Service QoS AMG1302 T10A User s Guide 176 ...
Page 198: ...Chapter 18 Universal Plug and Play UPnP AMG1302 T10A User s Guide 198 ...
Page 202: ...Chapter 19 CWMP AMG1302 T10A User s Guide 202 ...
Page 206: ...Chapter 20 System Settings AMG1302 T10A User s Guide 206 ...
Page 216: ...Chapter 21 Logs AMG1302 T10A User s Guide 216 ...
Page 266: ...Appendix C Pop up Windows JavaScripts and Java Permissions AMG1302 T10A User s Guide 266 ...
Page 280: ...Appendix D Wireless LANs AMG1302 T10A User s Guide 280 ...
Page 290: ...Appendix E IPv6 AMG1302 T10A User s Guide 290 ...
Page 322: ...Appendix G Legal InformationSafety Warnings AMG1302 T10A User s Guide 322 ...