ZyXEL Communications MAX-206M1R series - Figure 34 Multiple Servers Behind NAT Example; Figure 35 ADVANCED > NAT Configuration > Port Forwarding; Port Forwarding Options

Chapter 8 The NAT Configuration Screens
User’s Guide
91
For example, let's say you want to assign ports 21-25 to one FTP, Telnet and
SMTP server (A in the example), port 80 to another (B in the example) and assign
a default server IP address of 192.168.1.35 to a third (C in the example). You
assign the LAN IP addresses and the ISP assigns the WAN IP address. The NAT
network appears as a single host on the Internet.
Figure 34 Multiple Servers Behind NAT Example
8.3.1 Port Forwarding Options
Click ADVANCED > NAT Configuration > Port Forwarding to look at the
current port-forwarding rules in the WiMAX Modem, and to enable, disable,
activate, and deactivate each one. You can also set up a default server to handle
ports not covered by rules.
Figure 35 ADVANCED > NAT Configuration > Port Forwarding