Filter
Top Products
EtherFast
®
Cable/DSL Routers
57
Instant Broadband
™
Series
56
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.
2. Next to the name of the application, enter the number or range of the exter-
nal port(s) used by the server or Internet application in the Ext. Port col-
umn. Check with the Internet application software documentation for more
information.
3. On the same line, select the protocol 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. To find the IP address, go to “Appendix F: Finding the MAC
Address and IP Address for Your Network 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 Continue button when you are done.
UPnP Forwarding
The UPnP Forwarding screen, shown in Figure 8-17, displays preset applica-
tion settings as well as options for customization of port services for other
applications.
The Preset Applications 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 Web site on a local machine, they are typically uploaded to the
Web server using FTP. FTP includes functions to log onto the network, list
directories, and copy files. It can also convert between the ASCII and
EBCDIC character codes. FTP operations can be performed by typing com-
mands at a command prompt or via an FTP utility running under a graphi-
cal interface such as Windows. FTP transfers can also be initiated from with-
in a Web browser by entering the URL preceded with ftp://.
Using Remote Upgrade
• This feature allows you to upgrade your Router’s firmware from a remote
location. To enable Remote Upgrade, click on Enable, and then click on the
Apply button. Then click the Continue button. Remote Management must be
activated before you can manage the Router from a remote location.
Using MTU (Maximum Transmission Unit)
• This feature specifies the largest packet size permitted for network transmis-
sion. Select Enable and enter the value desired. It is recommended that you
leave this value at the 1200 to 1500 range. For most DSL users, it is recom-
mended to use 1492. By default, MTU is set at 1500 when disabled.
Port Range Forwarding sets up public services on your network, such as web
servers, ftp servers, email 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 for-
ward 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.
Port Range Forwarding
Figure 8-16