ZyXEL MAX-306 User Guide - Page 210
Solving the Triangle Route Problem,
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Chapter 16 The Firewall Screens As a result, the WiMAX Device resets the connection, as the connection has not been acknowledged. Figure 96 "Triangle Route" Problem 16.4.3.1 Solving the "Triangle Route" Problem If you have the WiMAX Device allow triangle route sessions, traffic from the WAN can go directly to a LAN computer without passing through the WiMAX 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 WiMAX Device supports up to three logical LAN interfaces with the WiMAX 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 WiMAX 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 WiMAX Device reroutes the packet to Gateway A, which is in Subnet 2. 3 The reply from the WAN goes to the WiMAX Device. 210 User's Guide