NETGEAR DG632 - ADSL Modem Router, Reference Manual

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Reference Manual for the Model DG632 ADSL Modem Router
6-16 Using Router Mode
Figure 6-11: Rules menu
• To edit an existing rule, select its button on the left side of the table and click Edit.
• To delete an existing rule, select its button on the left side of the table and click Delete.
Inbound Rules (Port Forwarding)
Because the DG632 uses Network Address Translation (NAT), your network presents only one IP
address to the Internet, and outside users cannot directly address any of your local computers.
However, by defining an inbound rule you can make a local server (for example, a Web server or
game server) visible and available to the Internet. The rule tells the modem to direct inbound
traffic for a particular service to one local server based on the destination port number. This is also
known as port forwarding.
Remember that allowing inbound services opens holes in your firewall. Only enable those ports
that are necessary for your network. Following are two application examples of inbound rules:
Note: Some residential broadband ISP accounts do not allow you to run any server
processes (such as a Web or FTP server) from your location. Your ISP may periodically
check for servers and may suspend your account if it discovers any active services at
your location. If you are unsure, refer to the Acceptable Use Policy of your ISP.