Using Nat; Sua (Single User Account) Versus Nat; Table 98 Nat Mapping Types - ZyXEL Communications ZyWall 70 User Manual

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• Server: This type allows you to specify inside servers of different services behind the

NAT to be accessible to the outside world although, it is highly recommended that you

use the DMZ port for these servers instead.

Note: Port numbers do not change for One-to-One and Many-One-to-One NAT

mapping types.

The following table summarizes these types.

Many-to-One (SUA/PAT)

Many-to-Many Overload

Many-One-to-One

17.2 Using NAT

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 ZyWALL.

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 ZyWALL also supports Full Feature NAT

to map multiple global IP addresses to multiple private LAN IP addresses of clients or servers

using mapping types. Select either SUA or Full Feature in NAT Overview.

Selecting SUA means (latent) multiple WAN-to-LAN and WAN-to-DMZ address translation.

That means that computers on your DMZ with public IP addresses will still have to undergo

NAT mapping if you're using SUA NAT mapping. If this is not your intention, then select

Full Feature NAT and don't configure NAT mapping rules to those computers with public

IP addresses on the DMZ.

Chapter 17 Network Address Translation (NAT)

ZyWALL 70 User's Guide

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