A. It is possible to restrict the ability to list domain user names and enumerate share names available to anonymous logon users (also known as NULL session connections). If you feel this is a security risk Service Pack 3 for Windows NT 4.0 introduces a new option to stop anonymous users listing users and shares.
To enable this perform the following:
- Start the registry editor (regedit.exe)
- Move to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa
- From the Edit menu select New - DWORD value and enter a name of RestrictAnonymous if it does not already exist
- Double click the value and set to 1. Click OK
- Reboot the computer
After performing this change you should update your Emergency Repair Disk using RDISK.EXE.