Nat Server Sets - Port Forwarding - ZyXEL Communications Prestige 314 PLUS User Manual

FIELD
End This is the ending global IP address (IGA). This field is N/A for
One-to-One, Many-to-One and Server types.
Once you have finished configuring a rule in this menu, press [ENTER] at the message "Press
ENTER to Confirm..." to save your configuration, or press [ESC] to cancel.
4.4 NAT Server Sets – Port Forwarding
A NAT server set is a list of inside (behind NAT on the LAN) servers, for example, web or FTP, that you can
make visible to the outside world even though NAT makes your whole inside network appear as a single
machine to the outside world.
Use Menu 15 - NAT Setup to forward incoming service requests to the server(s) on your local network. You
may enter a single port number or a range of port numbers to be forwarded, and the local IP address of the
desired server. The port number identifies a service; for example, web service is on port 80 and FTP on port
21. In some cases, such as for unknown services or where one server can support more than one service (for
example both FTP and web service), it might be better to specify a range of port numbers. Entry 12 (port
1026) is non-editable (see Figure 4-10).
In addition to the servers for specified services, NAT supports a default server. A service request that does
not have a server explicitly designated for it is forwarded to the default server. If the default is not defined,
the service request is simply discarded.
Many residential broadband ISP accounts do not allow you to run any server
processes (such as a Web or FTP server) from your location. Your ISP may
periodically check for servers and may suspend your account if it discovers any
active services at your location. If you are unsure, refer to your ISP.
The most often used port numbers are shown in the following table. Please refer to RFC 1700 for further
information about port numbers. Please also refer to the included disk for more examples and details on
NAT.
NAT
Prestige 314 PLUS Broadband Sharing Gateway with 4-Port Switch
DESCRIPTION EXAMPLE
N/A
4-13