User's Manual

Chapter 9 Network Address Translation (NAT)
AMG1202-T10A User’s Guide
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Port Forwarding
A port forwarding set is a list of inside (behind NAT on the LAN) servers, for example, web or FTP,
that you can make visible to the outside world even though NAT makes your whole inside network
appear as a single computer to the outside world.
SUA (Single User Account) Versus NAT
SUA (Single User Account) is a ZyNOS implementation of a subset of NAT that supports two types
of mapping, Many-to-One and Server. The ZyXEL Device also supports Full Feature NAT to map
multiple global IP addresses to multiple private LAN IP addresses of clients or servers using
mapping types as outlined in Table 48 on page 138.
• Choose SUA Only if you have just one public WAN IP address for your ZyXEL Device.
• Choose Full Feature if you have multiple public WAN IP addresses for your ZyXEL Device.
Finding Out More
See Section 9.6 on page 135 for advanced technical information on NAT.
9.2 The NAT General Setup Screen
Use this screen to activate NAT. Click Network > NAT to open the following screen.
Note: You must create a firewall rule in addition to setting up SUA/NAT, to allow traffic
from the WAN to be forwarded through the ZyXEL Device.
Figure 64 Network > NAT > General
The following table describes the labels in this screen.
Table 41 Network > NAT > General
LABEL DESCRIPTION
Active Network
Address
Translation
Select this check box to enable NAT.
SUA Only Select this radio button if you have just one public WAN IP address for your
ZyXEL Device.