Technical Reference; Nat Port Forwarding: Services And Port Numbers - ZyXEL Communications NBG-416N User Manual

Table 42 Network > NAT > Application (continued)
LABEL
Reset
Application Rules Summary
#
Active
Name
Local Start/End
Port
Public Start/End
Port
Protocol
Server IP
Address
Modify

11.5 Technical Reference

The following section contains additional technical information about the NBG-
416N features described in this chapter.

11.5.1 NAT Port Forwarding: Services and Port Numbers

A port forwarding set is a list of inside (behind NAT on the LAN) servers, for
example, web or FTP, that you can make accessible to the outside world even
though NAT makes your whole inside network appear as a single machine to the
outside world.
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
NBG-416N User's Guide
DESCRIPTION
Click Reset to not save and return your new changes in the Service
Name and Port fields to the previous one.
This is the number of an individual port forwarding server entry.
This icon is turned on when the rule is enabled.
This field displays a name to identify this rule.
This field displays the port number(s).
This field displays the traffic protocol type.
This field displays the inside IP address of the server.
Click the Edit icon to display and modify an existing rule setting in the
fields under Add Application Rule.
Click the Remove icon to delete a rule.
Chapter 11 Network Address Translation (NAT)
107