Dial-Up Connection in ICS Does Not Prompt to Disconnect on ClientID: Q237806 
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When you quit Microsoft Internet Explorer on an Internet Connection Sharing (ICS) client computer, you are not prompted to disconnect. The dial-up connection on the ICS host computer remains connected.
Quitting Internet Explorer on the ICS host computer causes a prompt to disconnect from a dial-up connection.
This behavior is by design.
The communication between the ICS host and client is a network-style peer-to-peer connection without Dial-Up Networking involved. Therefore, ICS does not disconnect the dial-up connection on the ICS host.
When you quit Internet Explorer on the ICS host, it communicates to the local dial-up connection and you are prompted to disconnect from the dial-up connection.
Additional query words:
Keywords          : kbenv win98se 
Version           : WINDOWS:
Platform          : WINDOWS 
Issue type        : kbprb 
Last Reviewed: July 20, 1999