ZyXEL Communications ZYWALL 1050 Support Notes page 318

ZyWALL 1050/ZyWALL USG 300 Support Notes
mapping public IP address- 192.168.35.100.
2. From the Virtual Server setting, ZyWALL 1050/ZyWALL USG 300 forwards it to the
internal IP 192.168.105.37.
3. The Web server receives a request from the same subnet and replies it directly to PC
through L2 switch dispatching. This is known as "triangle route".
Please follow these steps to configure the ZyWALL 1050/ZyWALL USG 300 in order to
solve the triangle route problem:
1-1 NAT mapping Configuration:
Firstly create two address objects: WEB_WAN as 192.168.35.100 and WEB_LAN as
192.168.105.37. After that, create the Virtual Server rule of incoming DNAT translation to
allow the server connect to outside network.
Create one Policy Route rule for outgoing SNAT to translate the private IP to public one.
After these two steps, the 1-1 NAT mapping on ZyWALL 1050/ZyWALL USG 300 is
complete.
318
All contents copyright (c) 2007 ZyXEL Communications Corporation.