Figure 174 Advanced > Nat > Nat Overview; Table 86 Advanced > Nat > Nat Overview - ZyXEL Communications ZYWALL P1 User Manual

Chapter 16 Network Address Translation (NAT)
Figure 174 ADVANCED > NAT > NAT Overview
The following table describes the labels in this screen.
Table 86 ADVANCED > NAT > NAT Overview
LABEL
Max.
Concurrent
Sessions
Max.
Concurrent
Sessions Per
Host
Enable NAT
Address
Mapping Rules
276
DESCRIPTION
This read-only field displays the highest number of NAT sessions that the ZyWALL
will permit at one time.
When computers use peer to peer applications, such as file sharing applications,
they need to establish NAT sessions. If you do not limit the number of NAT sessions
a single client can establish, this can result in all of the available NAT sessions being
used. In this case, no additional NAT sessions can be established, and users may
not be able to access the Internet.
Use this field to set the highest number of NAT sessions that the ZyWALL will permit
a host to have at one time.
If your network has one or two clients using peer to peer applications, you can raise
this number to ensure that their performance is not degraded by the number of NAT
sessions they can establish. If your network has more users using peer to peer
applications, you can lower this number to ensure no single client is using all of the
available NAT sessions.
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.
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.
Note: Full feature address mapping is available while the ZyWALL is
in routing mode.
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.
ZyWALL P1 User's Guide