5 configuring port forwarding – ZyXEL Communications P-660R-D Series User Manual
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P-660R-D Series User’s Guide
Chapter 6 Network Address Translation (NAT) Screens
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6.4.3 Configuring Servers Behind 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 45 Multiple Servers Behind NAT Example
6.5 Configuring Port Forwarding
Note: The Port Forwarding screen is available only when you select SUA Only in
the NAT > General screen.
If you do not assign a Default Server IP address, the ZyXEL Device discards
all packets received for ports that are not specified here or in the remote
management setup.
Click Network > NAT > Port Forwarding to open the following screen.
See
for port numbers commonly used for particular services.
Figure 46 NAT Port Forwarding