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FreeNASĀ® is an embedded open source network attached storage (NAS) system based on FreeBSD and released under a BSD license. A NAS provides an operating system that has been optimized for file storage and sharing.

Notable features in FreeNASĀ® include:

  • supports AFP, CIFS, FTP, NFS, SSH (including SFTP), and TFTP as file sharing mechanisms
  • supports exporting file or device extents via iSCSI
  • supports Active Directory or LDAP for user authentication as well as manual user and group creation
  • supports the creation and import of UFS2 based volumes, including gmirror, gstripe, and graid3
  • supports the creation and import of ZFS pools, enabling many features not available in UFS2 such as quotas, snapshots, compression, replication, and datasets for sharing subsets of volumes
  • upgrade procedure saves the current operating system to an inactive partition, allowing for an easy reversal of an undesirable upgrade
  • system notifications are automatically mailed to the root user account
  • Django driven graphical user interface available through a web browser
  • secure replication, automatic ZFS snapshots, scheduling of ZFS scrubs, and cron management are all configurable through the graphical interface
  • support for menu localization and keyboard layouts
  • SMART monitoring and UPS management in GUI
  • support for Windows ACLs and UNIX filesystem permissions
  • periodic ZFS snapshots are visible in Windows as shadow copies
  • includes tmux, a BSD-licensed utility similar to GNU screen
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