ZyXEL Communications 200 Series User Manual

ZyWALL USG 100/200 Series User’s Guide

Use policy routes and static routes to override the ZyWALL’s default routing behavior in 
order to send packets through the appropriate the interface or VPN tunnel. 

For example, the next figure shows a computer (A) connected to the ZyWALL’s LAN 
interface. The ZyWALL routes most traffic from A to the Internet through the ZyWALL’s 
default gateway (R1). You create one policy route to connect to services offered by your ISP 
behind router R2. You create another policy route to communicate with a separate network 
behind another router (R3) connected to the LAN.

Figure 193   Example of Policy Routing Topology

You also use policy routes to send traffic through VPN tunnels. Using the VPN wizard 
automatically configures a corresponding policy route, but you must manually configure a 
policy route if you use the main VPN screens to configure a VPN connection. 

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You can generally just use policy routes. You only need to use static routes if 
you have a large network with multiple routers where you use RIP or OSPF to 
propagate routing information to other routers.