ZyXEL Communications ZyWALL 2 Plus - Manual (Page 336)

Chapter 17 Network Address Translation (NAT)
ZyWALL 2 Plus User’s Guide
336
Selecting SUA means (latent) multiple WAN-to-LAN and WAN-to-DMZ address translation.
That means that computers on your DMZ with public IP addresses will still have to undergo
NAT mapping if you’re using SUA NAT mapping. If this is not your intention, then select
Full Feature NAT and don’t configure NAT mapping rules to those computers with public
IP addresses on the DMZ.
17.3 NAT Overview Screen
Click ADVANCED > NAT to open the NAT Overview screen.
Figure 218 ADVANCED > NAT > NAT Overview
The following table describes the labels in this screen.
Table 95 ADVANCED > NAT > NAT Overview
LABEL DESCRIPTION
NAT Setup
Max.
Concurrent
Sessions
This read-only field displays the highest number of NAT sessions that the ZyWALL
will permit at one time.
Max.
Concurrent
Sessions Per
Host
Use this field to set the highest number of NAT sessions that the ZyWALL will permit
a host to have at one time.
Enable NAT Select this check box to turn on the NAT feature for the WAN port. Clear this check
box to turn off the NAT feature for the WAN port.
Address
Mapping Rules
Select SUA if you have just one public WAN IP address for your ZyWALL. This lets
the ZyWALL use its permanent, pre-defined NAT address mapping rules.
Select Full Feature if you have multiple public WAN IP addresses for your ZyWALL.
This lets the ZyWALL use the address mapping rules that you configure. This is the
equivalent of what used to be called full feature NAT or multi-NAT.
The bar displays how many of the ZyWALL's possible address mapping rules are
configured. The first number shows how many address mapping rules are
configured on the ZyWALL. The second number shows the maximum number of
address mapping rules that can be configured on the ZyWALL.