ZyWALL 70 Support Notes
All contents copyright (c) 2005 ZyXEL Communications Corporation.
23
(2). port3 for DMZ
(3). Click ‘WLAN’ from the right wireless card. It will make the wireless card be an independent
interface and own an independent subnet. After it’s done, the WLAN selection for 4 ports will be
available. Choose port4 for WLAN. So the server or PC hosts connect to port4 will be in the same subnet
with WLAN.
In this way, admin can utilize 4+1 ports flexibly.
Using NAT/Multi-NAT
• What is Multi-NAT?
• How NAT works
• NAT Mapping Types
• SUA versus Multi-NAT
• Example
Step 1. Applying NAT on WAN Interface
Step 2. Configuring NAT Address Mapping
Step 3. Using Multiple Global IP addresses for clients and servers (One-to-One, Many-to-One,
Server Set mapping types)
• Application -- Non NAT-Friendly Support
• What is Multi-NAT?
NAT (Network Address Translation-NAT RFC 1631) is the translation of an Internet Protocol address used
within one network to a different IP address known within another network. One network is designated the
inside
network and the other is the
outside
. Typically, a company maps its local inside network addresses to one
or more global outside IP addresses and "unmaps" the global IP addresses on incoming packets back into local
IP addresses. The IP addresses for the NAT can be either fixed or dynamically assigned by the ISP. In addition,
you can designate servers, e.g., a web server and a telnet server, on your local network and make them
