Configuring Port Forwarding - ZyXEL Communications PMG5318-B20A User Manual

Chapter 7 NAT
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 41 Multiple Servers Behind NAT Example

7.3 Configuring Port Forwarding

Click Network > NAT > Port Forwarding to open the following screen.
Figure 42 Port Forwarding
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PMG5318-B20A User's Guide