User's Manual

Configuring the Gateway’s mso Interface
157
SMCD3GNV Wireless Cable Modem Gateway User Manual
Using Advanced Features
Using the Advanced Features menu, you can:
 Enable or disable port forwarding. See page 157.
 Enable or disable port triggering. See page 160.
 Enable or disable remote management. See page 163.
 Configuring DMZ settings. See page 165.
 Configure routing. See page 167.
 Configure Dynamic DNS. See page 169.
 Use the Gateway’s UPnP feature to discover UPnP-enabled devices. See page 171.
Enabling or Disabling Port Forwarding
Using the Firewall menu (described on page 53), you can configure the Gateway to create a
firewall between your internal network and the Internet. A firewall keeps unwanted traffic
from the Internet away from your networked computers. There may be times, however, when
you want a “tunnel” to be created through the Gateway firewall, so computers on the Internet
can communicate to one of the computers on your LAN using a single port. This is handy for
running Web servers, game servers, FTP servers, or even video conferencing.
Port forwarding allows outside users access to the computers on your LAN using a given
port or range of ports. Using port forwarding, for example, one of your computers can run a
Web server (port 80) while another computer runs an FTP server (port 23) - both using the
same IP address.
You configure the Gateway’s port forwarding feature using the Port Forwarding menu. To
display this menu, click Advanced in the menu bar. Figure 92 shows an example of the
menu.