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Remote Backup: Rsync

Before following the instructions below, make certain that:

  • The source and destination NAS devices are powered on.
  • The destination NAS is connected to a network, local or offsite.
  • Local network: you must have the name or IP address of the rsync-compatible NAS.
  • Offsite: you have rsync-compatible NAS’s public IP address. You can find the public IP address by visiting or by accessing your router's management software. When searching for the public IP address, use a computer connected to the same router as the destination NAS. For further information, review the user manual for the offsite network router or contact your Internet service provider.
  • Offsite: the ports are open for the backup. You may need to open ports using your router's management software. Review the user manuals for your rsync-compatible NAS and router.
  • You have the username and password for the rsync-compatible NAS. Many NAS feature unique credentials for rsync backups.


Adding an rsync backup


  1. Go to NAS OS in an Internet browser and choose Backup.
  2. Choose Add backup to launch the Backup & Restore Wizard.
  3. Select Network backup and choose Next.
  4. Select the shares you want to back up.
  5. Select Rsync-compatible server and choose Next.
  6. Network IP address:
    • Local network: enter the destination NAS's name or IP address.
    • Offsite network: enter the destination NAS's public IP address. If you do not know the public address for the destination NAS, refer to the offsite network router's documentation or contact the Internet service provider.
  7. Choose Next to continue.
  8. Enter the login and password for the rsync-compatible NAS (see the rsync-compatible NAS's documentation for details on creating a login and password for network backups). If the destination NAS cannot be found, make certain that:
    • It is powered on and out of sleep mode.
    • The proper IP address has been entered.
  9. Choose Next.
  10. The Advanced parameters window lists four options for your backup job. See the explanations below. It is not mandatory to select one or more of the parameters to continue with the backup:
    • Secure data transfers uses encryption during the data transfer. The data is not encrypted once it is stored on the destination NAS. This option is ideal for offsite backups.
    • Compressing data during a transfer optimizes data transmission rates. Data is compressed during the transfer only. While this option is good for low bandwidth networks, it can affect the NAS's performance.
    • Send only modified parts of files is best used with backups that include files larger than 50MB. For example, if you edit a document that has already been backed up, only the edits will be copied during the next backup. This option can affect the NAS's performance.
    • Maintain files on the destination folder keeps files on the destination NAS even if they are deleted from the original NAS's source folder.
  11. Choose Next.
  12. Set the frequency for the backup.
    • Manual: You must initiate the backup.
    • Scheduled: The backup will begin at the scheduled time.
  13. Enter a name for the backup job then choose Next. The name will be listed on the Backup page job table. It is also the reference name for the backup job's folder on the destination volume.
  14. Confirm the backup settings on the Summary page. If you wish to begin the backup immediately, keep the box checked below the summary and choose Finish.


The Backup job will appear on the Backup page.


Manual backups

The administrator must start a manual backup:

  1. Navigate to NAS OS > Backup.
  2. Locate the manual backup job you wish to start then pass the cursor to the far right of its row to enable the grey arrow.
  3. Click on the backup job's grey arrow icon to initiate the backup.