To Configure Service Mappings
Click Start, click Control Panel, click Network and Internet Connections, and then click Network Connections.
View the properties for the interface that connects to the Internet.
Click the Advanced tab, ensure that either ICF or ICS is enabled. If neither ICF nor ICS is enabled, the Settings button is unavailable, and any service mappings that are listed are ignored.
To configure a service to be redirected to an internal host, use the following steps only if ICS is enabled for the connection:
Click the service in the list and make sure its check box is selected.
In the Name or IP address box, type the name or IP address of the internal host on which the service is running.