Change Password System

This application will be utilized to automate the reseting of my passwords on many UNIX systems. I have to maintain a current password on over 500 unix systems. I require a windows based application that will do the following: 1. SSH or Telnet to a list of UNIX systems (Flavors of UNIX will be different) 2. LOGON with a username and password provided. 3. Issue a password change command (passwd). 4. send the current password 5. provide a new password 6. provide the new password again. 7. Generate a report after all hosts passwords have been reset. The application will need to read from several parameter or variable files. A. HOSTNAME file - This will be a list of host names I need to connect to. B. Username- This is the Username Variable C. currentPassword - This is the current password D. NewPassword - This will be the new password.