Wyse Technology 90955101L guide

Chapter 5

Caution

Contents of the File Based Write Filter cache should never be flushed if it is eighty-percent or more full. The Administrator should periodically check the status of the cache and restart the thin client if the cache is more than eighty percent full.

Note

A Terminal Services Client Access License (TSCAL) is always preserved regardless of File Based Write Filter state (enabled or disabled).

If you want to have other registry settings preserved regardless of File Based Write Filter state, contact Wyse support for help as described in "Wyse Technical Support."

For more detailed information on using the File Based Write Filter, refer to:

•"Changing Passwords with the File Based Write Filter"

•"Running File Based Write Filter Command Line Options"

•"Enabling and Disabling the File Based Write Filter Using the Desktop Icons"

•"Setting the File Based Write Filter Controls"

Changing Passwords with the File Based Write Filter

On Microsoft Windows NT-based computers and on Microsoft Windows 2000 or

2003-based computers, machine account passwords are regularly changed with the domain controller for security purposes. By default, on Windows NT-based computers, the machine account password automatically changes every seven days. On Windows 2000 or 2003-based computers, the machine account password automatically changes every 30 days.

The same password process is applicable for a thin client if the thin client is a member of such a domain. With the File Based Write Filter enabled, a thin client will successfully make this password change with the domain controller. However, since the File Based Write Filter is enabled, the next time the thin client is booted it will not retain the new password. In such cases, you can use the following options:

•Disable the machine account password change on the thin client by setting the DisablePasswordChange registry entry to a value of 1.

•Disable the machine account password change in Windows NT 4.0 or in Windows 2000 or 2003, by setting the RefusePasswordChange registry entry to a value of 1 on all domain controllers in the domain instead of on all workstations. Wyse thin clients will still attempt to change their passwords every 30 days, but the change will be rejected by the server.

Note

On Windows NT 4.0 domain controllers, you must change the RefusePasswordChange registry entry to a value of 1 on all Backup Domain Controllers (BDCs) in the domain before you make the change on the Primary Domain Controller (PDC). Failure to follow this order will cause event ID 5722 to be logged in the event log of the PDC.

If you set the RefusePasswordChange registry entry in the Windows 2000 or 2003 Domain Controller to a value of 1, the replication traffic will stop, but not the thin client traffic. If you also set the DisablePasswordChange registry entry to a value of 1 in the thin client, both thin client and replication traffic will stop.