Nat Application Screen - ZyXEL Communications NBG-416N User Manual

Table 41 Network > NAT > General (continued)
LABEL
Server IP
Address
Apply
Reset

11.4 NAT Application Screen

Use the Application screen 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.
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.
Note: 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.
Port forwarding allows you to define the local servers to which the incoming
services will be forwarded. To change your NBG-416N's port forwarding settings,
click Network > NAT > Application. The screen appears as shown.
Note: If you do not assign a Default Server IP address in the NAT > General screen,
the NBG-416N discards all packets received for ports that are not specified in
this screen or remote management.
NBG-416N User's Guide
DESCRIPTION
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 Application screen.
If you do not assign a Default Server IP address, the NBG-416N
discards all packets received for ports that are not specified in the
Application screen or remote management.
Click Apply to save your changes back to the NBG-416N.
Click Reset to begin configuring this screen afresh.
Chapter 11 Network Address Translation (NAT)
105