Wireless-N ADSL2+ Modem Router DGN2000 Reference Manual
Protecting Your Network 3-7
v1.0, July 2008
Remember that allowing inbound services opens holes in your firewall. Enable only those ports
that are necessary for your network. Following are two application examples of inbound rules.
Inbound Rule Example: A Local Public Web Server
If you host a public Web server on your local network, you can define a rule to allow inbound Web
(HTTP) requests from any outside IP address to the IP address of your Web server at any time of
day. This rule is shown in the following figure:
The settings are:
• Service. From this list, select the application or service to be allowed or blocked. The list
already displays many common services, but you are not limited to these choices. Use the
Services screen to add any additional services or applications that do not already appear. See
“How to Define Services” on page 3-12.
• Action. Choose how you want this type of traffic to be handled. You can block or allow
always, or you can block or allow according to the schedule you have defined in the Schedule
screen.
• Send to LAN Server. Enter the IP address of the computer or server on your LAN that will
receive the inbound traffic covered by this rule.
Figure 3-5
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