You can setup port filtering with Windows 2000 Server if you want to block unused ports to make your server more secure. Right click "My Network Places" (located on your desktop), click "Properties," right click your network connection, click "Properties," under "Components checked are used by this connection:" select "Internet Protocol (TCP/IP)," click "Properties," click "Advanced:," select the "Options" tab, select "TCP/IP filtering," and click "Properties." In this dialog, you can choose the ports you want filtered. (Note: Keep TCP Port 3389 open for Terminal Services. If this port is disabled, you will no longer be able to access your server though Terminal Services).
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