Port Range Forwarding - Network Everywhere NR041 User Manual

Port Range Forwarding

Port Range Forwarding sets up public services on your network, such as web
servers, ftp servers, e-mail servers, or other specialized Internet applications.
(Specialized Internet applications are any applications that use Internet access
to perform functions such as videoconferencing or online gaming. Some
Internet applications may not require any forwarding.) When users send this
type of request to your network via the Internet, the Router will forward those
requests to the appropriate PC. Before using Forwarding, the Router's DHCP
function must be disabled under the DHCP tab and the Router must be assigned
a new static LAN IP address because the IP address may change when using
the DHCP server.
If you need to forward all ports to one PC, see the "DMZ" section.
To add a server using Port Range Forwarding:
1. Enter the name of the application in the appropriate Customized
Applications field.
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Network Everywhere
Figure 6-15
Series Cable/DSL 4-Port Router
™
2. Next to the name of the application, enter the number or range of the
external port(s) used by the server or Internet application in the Ext. Port
column. Check with the Internet application software documentation for
more information.
3. On the same line, select UDP or TCP, or select both protocols.
4. Enter the IP address of the server that you want the Internet users to be
able to access. For information about finding the IP address, go to
"Appendix F: Finding the MAC Address and IP Address for Your Ethernet
Adapter."
5. Check the Enable box to enable the services you have defined. Port Range
Forwarding will not function if the Enable button is left unchecked. This is
disabled (unchecked) by default.
6. Configure as many entries as needed—the Router supports up to 10 ranges
of ports. Click the Apply button and then the Continue button when you
are done.
UPnP Forwarding
Click the View UPnP Forwarding screen to access the UPnP Forwarding
screen, shown in Figure 6-16. This screen displays preset application settings
as well as options for customization of port services for other applications.
The Preset Applications at the top of the list are among the most widely used
Internet applications. They include the following:
• FTP (File Transfer Protocol) A protocol used to transfer files over a TCP/IP
network (Internet, UNIX, etc.). For example, after developing the HTML
pages for a website on a local machine, web developers typically upload the
files to the web server using FTP. FTP includes functions to log onto the net-
work, list directories, and copy files. FTP operations can be performed by
typing commands at a command prompt or via an FTP utility running under
a graphical interface such as Windows. FTP transfers can also be initiated
from within a web browser by entering the URL preceded by ftp://.
• Telnet A terminal emulation protocol commonly used on Internet and
TCP/IP-based networks. It allows a user at a terminal or computer to log onto
a remote device and run a program.
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