Configuring Servers Behind Port Forwarding (Example); Configuring Port Forwarding; Figure 85 Multiple Servers Behind Nat Example; Figure 86 Nat Port Forwarding - ZyXEL Communications 802.11g ADSL 2+ 4-Port Security Gateway HW-D Series User Manual

9.4.3 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 85 Multiple Servers Behind NAT Example

9.5 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 Table 55 on page 162

Figure 86 NAT Port Forwarding

Chapter 9 Network Address Translation (NAT) Screens
for port numbers commonly used for particular services.
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