ZyXEL Communications Armor Z1 NBG6816 User Manual page 78

Figure 47 Expert > WAN > NAT > General
The following table describes the labels in this screen.
Table 23 Expert > WAN > NAT > General
LABEL DESCRIPTION
General
Network Address Network Address Translation (NAT) allows the translation of an Internet protocol address
Translation (NAT) used within one network (for example a private IP address used in a local network) to a
different IP address known within another network (for example a public IP address used
on the Internet).
Select Enable to activate NAT. Select Disable to turn it off.
Default Server Setup
Default Server You can decide whether you want to use the default server or specify a server manually.
In addition to the servers for specified services, NAT supports a default server. A default
server receives packets from ports that are not specified in the port forwarding summary
table below.
Select this to use the default server.
Change To Server Select this and manually enter the server's IP address.
Port Forwarding
Service Name Select a pre-defined service from the drop-down list box. The pre-defined service port
number(s) and protocol will be displayed in the port forwarding summary table.
Otherwise, select User define to manually enter the Port number(s) and select the
Service Protocol.
Service Protocol Select the transport layer protocol supported by this virtual server. Choices are TCP,
UDP, or TCP_UDP.
If you have chosen a pre-defined service in the Service Name field, the protocol will be
configured automatically.
Server IP Address Enter the inside IP address of the virtual server here.
Chapter 10 WAN
ARMOR Z1 User's Guide
78