User guide

ADSL2+ 4-Port Ethernet USB Wireless-G Router - User Guide
4.5.20 Port Triggering
Port triggering is a specialized form of port forwarding which enables computers behind NAT to
be accessed. It triggers open an incoming port when a client on the LAN makes an outgoing
connection to a predetermined port on a server. Refer to Figure 1-32.
Figure 1-32 : Port Triggering
4.5.21 Port Forwarding
Using the Port Forwarding page, you can provide local services (for example web hosting) for
people on the Internet or play Internet games. When users send this type of request to your
network via the Internet, the ADSL Router will forward those requests to the appropriate PC.
Port forwarding can be used with DHCP assigned addresses but remember that a DHCP address
is dynamic (not static). For example, if you were configuring a Netmeeting server, you would
want to assign this server a static IP address so that the IP address is not reassigned. Also
remember that if an Internet user is trying to access an Internet application, they must use the
WAN IP address. The port forwarding will translate the WAN IP address into a LAN IP address.
To configure a service, game, or other application select the external connection (for example the
Internet connection), from the Home screen, click Advanced and under Application, select Port
Forwarding. Next select the computer hosting the service and add the corresponding firewall
rule. If you want to add a custom application, select the User category, click New and fill in the
Rule Name, Protocol and Port number for your application.
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