After authentication, all access to a private LAN continues to use the Windows NT-based security model. Access to resources on NTFS drives, or to other network resources requires the proper permissions. It is recommended that the NTFS file system is used for file resources that are accessed by PPTP clients.
For more information about using security on NTFS drives or other network resources, see your product documentation or the Windows NT Workstation version 4.0, Windows NT Server version 4.0, or Windows 95 Resource Kits.