ZyXEL Communications P-660HW-DX, User Manual

Page: 135 / 364

Chapter 8 Network Address Translation (NAT) Screens
P-660HW-Dx User’s Guide
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8.5.3 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 76 Multiple Servers Behind NAT Example
8.6 Configuring Port Forwarding
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The Port Forwarding screen is available only when you select SUA Only in the
NAT > General screen.
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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 47 on page 134 for port numbers commonly used for particular services.