ZyXEL g-2000 plusv2 Guia Do Utilizador

ZyXEL G-2000 Plus v2 User’s Guide

Chapter 8 Single User Account (SUA) / Network Address Translation (NAT)

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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.

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. Select either SUA Only or Full Feature in the WAN IP 
screen. 

A SUA server 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 SUA makes your whole 
inside network appear as a single computer to the outside world. 

You may enter a single port number or a range of port numbers to be forwarded, and the local 
IP address of the desired server. The port number identifies a service; for example, web 
service is on port 80 and FTP on port 21. In some cases, such as for unknown services or 
where one server can support more than one service (for example both FTP and web service), 
it might be better to specify a range of port numbers. You can allocate a server IP address that 
corresponds to a port or a range of ports.

Table 39   NAT Mapping Types

One-to-One

ILA1ÅÆ IGA1

1-1

Many-to-One (SUA/PAT)

ILA1ÅÆ IGA1
ILA2ÅÆ IGA1
…

M-1

Many-to-Many Overload

ILA1ÅÆ IGA1
ILA2ÅÆ IGA2
ILA3ÅÆ IGA1
ILA4ÅÆ IGA2
…

M-M Ov

Many One-to-One

ILA1ÅÆ IGA1
ILA2ÅÆ IGA2
ILA3ÅÆ IGA3
…

M-1-1

Server

Server 1 IPÅÆ IGA1
Server 2 IPÅÆ IGA1
Server 3 IPÅÆ IGA1

Server