ZyXEL Communications SBG3500-N000 User Manual page 221

Chapter 11 Network Address Translation (NAT)
Port Forwarding 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 88 Multiple Servers Behind NAT Example
A=192.168.1.33
192.168.1.1
B=192.168.1.34
IP address assigned by ISP
C=192.168.1.35
D=192.168.1.36
221
SBG3500-N000 User's Guide