ZyXEL Communications NBG6815 - Page 79

Chapter 10 WAN
NBG6815 User’s Guide
79
Figure 49 Expert Mode > WAN > NAT > General
The following table describes the labels in this screen.
Table 21 Expert Mode > WAN > NAT > General
LABEL DESCRIPTION
General
Network Address
Translation (NAT)
Network Address Translation (NAT) allows the translation of an Internet protocol address
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 (Max Limit : 32)
# This is the number of an individual port forwarding server entry.
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
Protocol.
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 Name field, the protocol will be
configured automatically.
Local Port This shows the port number(s) that identifies the service if you select a pre-defined
service. If you select User define in the Name field, enter the port number(s) manually.
Server IP Address Select User define to manually enter the inside IP address of the virtual server here.
Port This shows the port number(s) that identifies the service if you select a pre-defined
service. If you select User define in the Name field, enter the port number(s) manually.
Name This field displays a name to identify this rule.