ZyXEL Communications NBG6616 User Manual page 118

Port forwarding allows you to define the local servers to which the incoming services will be
forwarded. To change your NBG6616's port forwarding settings, click Network > NAT > Port
Forwarding. The screen appears as shown.
Note: If you do not assign a Default Server, the NBG6616 discards all packets received
for ports that are not specified in this screen or remote management.
Refer to Appendix C on page 224
Figure 77 Network > NAT > Port Forwarding
The following table describes the labels in this screen.
Table 50 Network > NAT > Port Forwarding
LABEL DESCRIPTION
Default Server Setup
Default Server 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
screen. You can decide whether you want to use the default server or specify a server
manually.
Select this to use the default server.
Change to Server Select this and manually enter the server's IP address.
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 IP
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 and click Add to add it in the port
forwarding summary table.
# This is the number of an individual port forwarding server entry.
Chapter 14 NAT
for port numbers commonly used for particular services.
NBG6616 User's Guide
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