ZyXEL Communications ZYWALL USG 2000 Support Notes page 199

ZyWALL USG 2000 Support Notes
F. Routing and NAT FAQ
F01. How to add a policy route?
From the GUI menu Policy >Route, click the "+" icon in the table and define matching
Criteria for this route. Then select a next-hop type. If you want to use Link HA and Load
Balance, "Trunk" should be selected as a next-hop type. If you want to route traffic into an
IPsec tunnel, you need to select "VPN tunnel". Please note that the policy routes will be
matched in order. If the first route matches the criteria, ZyWALL USG 2000 will use the route
setting to direct the traffic to the next hop.
F02. How to configure local loopback in ZyWALL USG 2000?
Local loopback is a feature used in the following scenario.
For a general application the users access to the web service by entering the FQDN (Full
Qualify Domain Name, e.g. http://www.zyxel.com) other than an IP address. This is because
the domain name is easier to remember. However, when both the Server and Client are located
behind the same NAT, a triangle route problem will encounter. See the example as illustrated
below to understand the network topology: (Here a Web server is used as an example.)
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