You may use this feature to establish a web server or FTP server for Internet
users to access. Be sure that you enter a valid IP address; you may need to
establish a static IP address with your ISP in order to properly run an Internet
server. For added security, Internet users will be able to communicate with the
server, but they will not actually be connected. The packets will be forwarded
through the Cable Gateway instead. If you need to forward all ports to one PC,
see the DMZ Host Tab.
To add a server using Forwarding:
1. Enter the IP address of the server that you want the Internet users to be
able to access into the Local IP Adr field. To find the IP address, go to
“Appendix D: Finding the MAC Address and IP Address for Your Ethernet
Adapter.”
2. Enter the range of the external port(s) used by the server or Internet appli-
cation in the Start Port and End Port columns. Check with the Internet
application software documentation for more information.
3. Select the protocol for each port number you want to forward, TCP, UDP,
or Both.
4. Click the Enabled button to enable the changes.
5. Configure as many entries as needed—the Cable Gateway supports up to
ten ranges of ports.
To delete a server entry, enter 0 in the Port and Local IP Address fields.
Click the Apply button to apply any changes.
27
Instant Broadband
®
Series
26
Cable Gateway
Forwarding Tab
This screen allows you configure port forwarding for local IP Addresses.
Port 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 Cable Gateway will for-
ward those requests to the appropriate PC.
Figure 5-3
