Configuring a Broadband Connection
With broadband connections, the task of preventing anonymous intruders from browsing shared folders and other resources on your LAN is trickier. In this configuration, you have two Ethernet adapters—one providing connectivity to your LAN, the other connecting you to the Internet. Windows automatically enables file and printer sharing on all Ethernet connections, and even the Network Setup Wizard in Windows XP does not disable sharing. Thus, your first priority should be to shut down this service on the Internet connection, while leaving it in place on the LAN connection. To do so, follow these steps:

Open the Network Connections folder (Windows XP) or the Network And Dial-Up Connections folder (Windows 2000). You should see at least two Local Area Connection icons.
Right-click the icon for your Internet connection and choose Properties from the shortcut menu.
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Tell your connections apart

When you have two or more network connections, how can you tell which is which? Windows isn't much help—it applies the generic label Local Area Connection for each one, tacking a number onto the end of the name for the second and subsequent connections. If the network adapter and the IP address don't give you enough information, try this easy shortcut: Right-click one icon and choose Disable from the shortcut menu. Leaving the other icon enabled, try to connect to a Web page. If you see an error message in your browser window, you know that the disabled icon belongs to your Internet connection and the other one goes with your local network. If the page appears, the roles are reversed. Armed with this information, right-click each icon in turn and choose Rename; then enter a descriptive label for each one so that you won't have to go through this rigmarole the next time you visit the Network Connections folder!

On the General tab, clear the check box to the left of File And Printer Sharing For Microsoft Networks.

Click OK to save your changes.

Libellés : Broadband, Configuring, Connection