Download the latest Secure Mobile Access firmware version.
In the Secure Mobile Access management interface, navigate to the System > Settings page.
Click Upload New Firmware under the Firmware Management section.
Click Browse.
Select the downloaded Secure Mobile Access firmware. It should have a .sig file extension.
Click Open.
Click Accept. Wait for the firmware to upload and be written to the disk.
The System > Settings page displays the firmware table, with the uploaded firmware listed in it. Click the Boot icon in the Uploaded Firmware row to boot the new firmware with existing settings.