ZyXEL Communications Internet Security Gateway ZyWALL 100 - Manual (Page 119)

ZyWALL 100 Internet Security Gateway
12-6 NAT
TYPE IP MAPPING SMT ABBREVIATION
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
12.2 Using 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.
12.2.1 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-One and Server. See section 12.3.1 for a detailed description of the NAT set for SUA.
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 as outlined in Table 12-2.
1. Choose SUA Only if you have just one public WAN IP address for your ZyWALL.
2. Choose Full Feature if you have multiple public WAN IP addresses for your ZyWALL.
12.2.2 Applying NAT
You apply NAT via menus 4 or 11.3 as displayed next. The next figure shows you how to apply NAT for
Internet access in menu 4. Enter 4 from the main menu to go to Menu 4 - Internet Access Setup