SonicOS supports the Firmware Auto Update feature, which helps ensure that your SonicWall security appliance has the latest firmware release.
To set the Firmware Auto Update options
Navigate to Device | Settings > Firmware and Settings.
Click Settings. The popup dialog displays
Click Firmware Auto Update.
Choose either:
Download new firmware automatically when available - Downloads new firmware releases to the SonicWall security appliance when they become available. This option is not selected by default.
Automatically install downloaded firmware - Automatically installs the previously downloaded firmware and updates as per the schedule.