Steps to upgrade SonicWALL Firmware

Procedure to upgrade the SonicWALL UTM Appliance firmware Image with Current Preferences (on Standard or Enhanced)

Perform the following steps to update your SonicWALL appliance with saved preference file (settings file): 

1.    Download the SonicOS Standard/Enhanced firmware image file from mysonicwall.com and save it to a location on your local computer. Refer Below:

To obtain a new SonicOS (Standard/Enhanced) firmware image file for your SonicWALL UTM appliance: 

        1. Connect to your mysonicwall.com account at http://www.mysonicwall.com.

        2. Click on Download Center on the left pane, select the appropriate Language and Software Type. 

      3. Click on the Firmware link to download the latest version (.sig file)

      Note: You can access previous firmware versions by clicking on the “Previous Versions” link

      4. Save the new SonicOS firmware image file to a directory on your management computer.

 2. On the System > Settings page, click the Export Settings button to save the current configuration to a file. You will be prompted to select the location on your hard drive to save the file.

     
3.  For good measure, click on the Create Backup Settings button to save the current firmware and settings within the SonicWALL appliance.

     
4. On the System > Settings page, click Upload New Firmware.

         
5. Browse to the location where you saved the SonicOS Standard/Enhanced firmware image file, select the file, and click Upload.

         
6. Click the Boot icon in the row for Uploaded Firmware - New!

 7. In the confirmation dialog box, click OK. The SonicWALL restarts and then displays the login page.

8. Enter your user name and password. Your new SonicOS Standard/Enhanced image version information is listed on the System > Settings page.

Source: https://support.software.dell.com/kb/sw5640