ZyWALL 10/50 Internet Security Gateway

9.2Using 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.

9.2.1 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. See section 9.3.1 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 9-2.

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.

9.2.2Applying 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.

Menu 4 - Internet Access Setup

ISP's Name= ChangeMe

Encapsulation= Ethernet

Service Type= Standard

My Login= N/A

My Password= N/A

Login Server IP= N/A

IP Address Assignment= Dynamic

IP Address= N/A

IP Subnet Mask= N/A

Gateway IP Address= N/A

Network Address Translation= SUA Only

Press ENTER to Confirm or ESC to Cancel:

Figure 9-3 Menu 4 — Applying NAT for Internet Access

9-6

NAT