I am using the setup as described in The Server Side and The Client Side to run Quicken on my Windows 95 ThinkPad and do home banking with the modem attached to my Linux machine. The "modem" in my case is not even a real modem, it is an emulated modem on an ISDN-So card. Quicken just sees a COM port, it doesn't know that the device attached to the COM port is actually at the other end of my Ethernet LAN, nor does it know that it is not a standard analog modem but an ISDN device which happens to understand AT commands.