3G Wireless Router User's Guide

Chapter 4 Tutorials
NBG410W3G Series User’s Guide
87
Figure 49 Tutorial Example: NAT Address Mapping Done
" To allow traffic from the WAN to be forwarded through the ZyXEL Device, you
must also create a firewall rule. Refer to Section 4.5.5 on page 89 for more
information.
4.5.4 Forwarding Traffic from the WAN to a Local Computer
A server NAT address mapping rule allows computers behind the NAT be accessible to the
outside world. To have the ZyXEL Device forward incoming traffic to a specific computer on
your local network, you should also create a port forwarding (server mapping) rule.
In this example, you want to forward FTP traffic using port 21 to the computer with the IP
address of 192.168.1.39.