ZyXEL p-334wh Guia Do Utilizador
P-334WH User’s Guide
Chapter 12 Firewall
137
12.2.1 Triangle Routes and IP Alias
You can use IP alias instead of allowing triangle routes. IP Alias allow you to partition your
network into logical sections over the same interface.
network into logical sections over the same interface.
By putting your LAN and Gateway A in different subnets, all returning network traffic must
pass through the ZyXEL Device to your LAN. The following steps describe such a scenario.
pass through the ZyXEL 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 ZyXEL Device reroutes the packet to Gateway A, which is in Subnet 2.
3 The reply from the WAN goes to the ZyXEL Device.
4 The ZyXEL Device then sends it to the computer on the LAN in Subnet 1.
Figure 75 Using IP Alias to Solve the Triangle Route Problem
12.3 General Firewall Screen
Click Security > Firewall to open the General screen.
Figure 76 General