Advanced file system (encrypt,compress,disk quota)

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  • 1. 70-290: MCSE Guide to Managing a Microsoft Windows Server 2003 Environment Advanced File System Management
  • 2. File Compression
    • Reduces amount of disk space needed for files and folders
    • Automatically uncompressed when the resource is accessed
    • Compressed resources displayed in different color in Windows Explorer (blue by default)
    • Moving and copying resources can affect compression
  • 3. Configuring Folder Compression Settings
    • Objective: Configure a folder to compress its contents
    • Create a folder, copy a file into it
    • Set the compression attribute on the folder to compress itself and its contents
    • Note the appearance of the folder and verify compression of contents
  • 4. (continued)
  • 5. COMPACT
    • Used with NTFS file system only
    • Command-line utility for configuring the compression attribute
    • Syntax
      • COMPACT (to view)
      • COMPACT switches resourcename (to set attributes)
    • Switches
      • /c (to compress resources)
      • /u (to uncompress resources)
  • 6. File Encryption
    • Encrypting File System (EFS) uses public key cryptography to encrypt files and folders
    • Only on NTFS file systems
    • Transparent to user
    • Implemented using 2 main types of keys
      • File encryption key (FEK)
        • Session key added to header of encrypted data ( data decryption field )
      • Public key encrypts DDF
  • 7. File Encryption (continued)
    • Main challenge for public key cryptography is when users leave organization
    • Can rename user account
    • Can use data recovery agent
      • FEK also stored in data recovery field (DRF)
      • Encrypted using data recovery agent’s public key
      • Default is administrator, additional recovery agents can be designated
    • Moving or copying files can affect encryption
    • Encrypted files cannot be compressed, vice versa
  • 8. Encrypting Files Using Windows Explorer
    • Objective: Implement and test file encryption security using EFS
    • Configure encryption on a folder and create a file in the folder
    • Try to open the folder and file from another user account and observe results
    • Try to open the folder and file from a domain administrator account and observe results
  • 9. Sharing Encrypted Files
    • In Windows 2000, only user and data recovery agent could access an encrypted file
    • In Windows Server 2003, Advanced Attributes allows sharing with other specific named users
    • Issues:
      • Only for files, not folders
      • Can only share with users, not groups
      • Users must have a certificate on computer
      • Users must have appropriate NTFS permissions
  • 10. Sharing Encrypted Files (continued)
  • 11. Disk Quotas
    • Disk quotas used to monitor and control user disk space
    • Advantages
      • Prevents users from consuming all disk space
      • Encourages users to delete old files
      • Allows monitoring for planning purposes
      • Allows monitoring of individual users
    • Disabled by default
    • Implemented only on NTFS volumes
    • Configured from Properties of a volume
  • 12. Disk Quotas (continued)
  • 13. Disk Quotas (continued)
  • 14. Disk Quotas (continued)
  • 15. Configuring and Managing Disk Quotas
    • Objective: Enable and manage disk quota settings
    • Enable quota management
    • Configure “soft” disk quota settings
    • Observe results
    • Set up a warning situation and observe results
  • 16. Managing Disk Quotas from the Command Line
    • FSUTIL QUOTA command-line utility can be used to manage disk quotas
      • Can enable/disable, modify, display, track, report
      • Example (to enable disk quotas on drive E)
        • fsutil quota enforce e:
      • Events written to System log (displayed in Event Viewer) every hour by default
        • fsutil behavior command can change the interval
    • Help available for fsutil quota and fsutil behavior commands in Help and Support Center
  • 17. Managing Disk Quotas from the Command Line (continued)