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Chapter 14 The Firewall Screens
User’s Guide
176
As a result, the WiMAX Modem resets the connection, as the connection has not
been acknowledged.
Figure 72 “Triangle Route” Problem
14.4.3.1 Solving the “Triangle Route” Problem
If you have the WiMAX Modem allow triangle route sessions, traffic from the WAN
can go directly to a LAN computer without passing through the WiMAX Modem 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 WiMAX Modem
supports up to three logical LAN interfaces with the WiMAX Modem 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 WiMAX Modem 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 WiMAX Modem reroutes the packet to Gateway A, which is in Subnet 2.
3 The reply from the WAN goes to the WiMAX Modem.