Chapter 17 Network Address Translation (NAT)

•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.

"Port numbers do not change for One-to-One and Many-One-to-One NAT mapping types.

The following table summarizes the NAT mapping types.

Table 94 NAT Mapping Types

TYPE

IP MAPPING

SMT ABBREVIATION

One-to-One

ILA1 IJ IGA1

1-1

 

 

 

Many-to-One (SUA/PAT)

ILA1 IJ IGA1

M-1

 

ILA2 IJ IGA1

 

 

…

 

 

 

 

Many-to-Many Overload

ILA IJ IGA1

M-M Ov

 

ILA2 IJ IGA2

 

 

ILA3 IJ IGA1

 

 

ILA4 IJ IGA2

 

 

…

 

 

 

 

Many-One-to-One

ILA1 IJ IGA1

M-1-1

 

ILA2 IJ IGA2

 

 

ILA3 IJ IGA3

 

 

…

 

 

 

 

Server

Server 1 IP IJ IGA1

Server

 

Server 2 IP IJ IGA1

 

 

Server 3 IP IJ IGA1

 

 

 

 

17.2Using NAT

"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.

17.2.1 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-Oneand 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.

 

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ZyWALL 2 Plus User’s Guide