ZyXEL 2WG Betriebsanweisung

 Chapter 4 Tutorial

ZyWALL 2WG User’s Guide

This section shows you examples of how to set up your ZyWALL if you have more than one 
fixed (static) IP address from your ISP. 

The following table shows the public IP addresses from your ISP and your ZyWALL’s LAN 
IP address.  

The following figure shows the network you want to set up in this example. 

• Assign the first public address (1.2.3.4) to the ZyWALL’s WAN 1 port.
• Map the second and third public IP addresses (1.2.3.5 and 1.2.3.6) to the web and mail 

servers (192.168.1.12 and 192.168.1.13) respectively for traffic in both directions.

• Map the first public address (1.2.3.4) to outgoing traffic from other local computers.
• Map the first public address (1.2.3.4) to incoming traffic from WAN 1.
• Forward FTP traffic using port 21 from WAN 1 to a specific local computer 

(192.168.1.39).

• The last public IP address (1.2.3.7) is not mapped to any device and is reserved for future 

use.

Figure 43   Tutorial Example: Using NAT with Static Public IP Addresses

To set up this network, we are going to:

1 Configure the WAN 1 connection to use the first public IP address (1.2.3.4).
2 Configure NAT address mapping for other public IP addresses (1.2.3.5 and 1.2.3.6).
3 Configure NAT port forwarding to forward FTP traffic from WAN 1 to a specific 

computer on your local network.

1.2.3.4 to 1.2.3.7

192.168.1.1