Docs4dev

Locate the image file matching your specific hardware model (e.g.,

Navigate through the version folders (e.g., v7.00 > 7.4 > 7.4.2 ) to find the .out file matching your specific hardware model. Click to download the file to your local machine. 3. Installation via GUI The process varies slightly depending on your version:

Open a web browser and navigate to the portal ( ://fortinet.com ). Log in using your registered Fortinet credentials.

If you need to narrow down these steps for your specific environment, let me know: What are you updating?

Preparation prevents prolonged downtime and provides a safety net if the installation encounters issues.

Go to (or Dashboard > Status > Firmware depending on your version).

Every firmware version comes with dedicated Release Notes available on the Fortinet Docs Library. Review these notes for:

This method is more robust if you are performing a over a slow WAN link.

Use a tool like SHA-256 to verify the downloaded file against the checksum provided on the download page to ensure the file isn't corrupted. 3. Installation Methods

If your FortiGate has an active support contract and direct internet access, you can view and download available updates directly from the management fabric: Log into your FortiGate GUI.

Clear your web browser cache. Major FortiOS upgrades change the underlying javascript and CSS files, which can cause local browser caching to break the display layout.

The original Primary unit then upgrades its firmware and reboots.

Scripting/automation — for scale

Look for "Configuration Checksum Error" logs. If found, run diagnose debug config-error-log read to see which settings failed to migrate.

Navigate to > Firmware (on older versions, this may be under Dashboard > Status > Firmware Widget ).

Click on in the top menu and select Firmware Download . Select FortiGate from the product dropdown menu. Click on the Download tab.

Every firmware version has Release Notes detailing: