Sua (Single User Account) Versus Nat; Nat Application - ZyXEL Communications ZyXEL ZYWALL10 User Manual

ZyWALL 10 Internet Security Gateway
Server

6.1.5 SUA (Single User Account) Versus NAT

SUA (Single User Account) in previous ZyNOS versions is a subset of NAT that supports two types of
mapping, Many-to-One and Server. See section 6.2.3 for a detailed description of the NAT set for SUA.
The ZyWALL now has Full Feature NAT support to map global IP addresses to local IP addresses of
clients or servers using all mapping types as outlined in Table 6-2. The ZyWALL supports NAT sets on a
remote node basis. They are reusable, but only one set is allowed for each remote node. The ZyWALL 10
supports 2 sets since there is only one remote node. The second set (SUA Only option in menu 15.1) is a
convenient, pre-configured, read only Many-to-One port mapping set, sufficient for most purposes (see
section 6.4 for some examples) and helpful to people already familiar with SUA in previous ZyNOS
versions.

6.1.6 NAT Application

The following figure illustrates a possible NAT application, where three inside LANs (logical LANs using
IP Alias) behind the ZyWALL can "talk" to three distinct Internet destinations. More examples follow at
the end of this chapter.
6-4
TYPE
Server 1 IP!" IGA1
Server 2 IP!" IGA1
Server 3 IP!" IGA1
IP MAPPING SMT ABBREVIATION
Server
NAT