ZyXEL ADSL Prestige 2602R-61 VoIP 91-006-024004B Manual Do Utilizador

Prestige 2602R Series User’s Guide

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Chapter 6 Network Address Translation (NAT) Screens

• One to One: In One-to-One mode, the Prestige maps one local IP address to one global 

IP address.

• Many to One: In Many-to-One mode, the Prestige maps multiple local IP addresses to 

one global IP address. This is equivalent to SUA (for instance, PAT, port address 
translation), ZyXEL’s Single User Account feature that previous ZyXEL routers 
supported (the SUA Only option in today’s routers). 

• Many to Many Overload: In Many-to-Many Overload mode, the Prestige maps the 

multiple local IP addresses to shared global IP addresses.

• Many-to-Many No Overload: In Many-to-Many No Overload mode, the Prestige maps 

each local IP address to a unique global IP address. 

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

NAT to be accessible to the outside world.

Port numbers do not change for One-to-One and Many-to-Many No Overload NAT 
mapping types. 

The following table summarizes these types.

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 Prestige 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 

• Choose SUA Only if you have just one public WAN IP address for your Prestige.

Table 19   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-to-Many No Overload

ILA1ÅÆ IGA1
ILA2ÅÆ IGA2
ILA3ÅÆ IGA3
…

M:M No OV

Server

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

Server