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Table of Contents

Administration Guide

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Downloading a firmware image

Firmware images for all FortiGate units are available on the Fortinet Customer Service & Support website.

To download firmware:
  1. Log into the support site with your user name and password.
  2. Go to Download > Firmware Images.

    A list of Release Notes is shown. If you have not already done so, download and review the Release Notes for the firmware version that you are upgrading your FortiGate unit to.

  3. Select the Download tab.

  4. Navigate to the folder for the firmware version that you are upgrading to.
  5. Find your device model from the list. FortiWiFi devices have file names that start with FWF.
  6. Click HTTPS in the far right column to download the firmware image to your computer.

note icon

Firmware can also be downloaded using FTP, but as FTP is not an encrypted file transferring protocol, HTTPS downloading is recommended.

FortiOS image signing and verification

Official FortiOS firmware images are signed by the Fortinet CA. The BIOS checks the validity of an image when it is uploaded to the device. If the image is not signed by the Fortinet CA, a warning message is shown in the GUI.

Unsigned image:

Signed image:

This functionality is implemented on the following devices:

FortiGate 40F

FortiWiFi 41F

FortiGate 100F

FortiGate 3400E

FortiGate 40F-3G4G

FortiWiFi 41F-3G4G

FortiGate 101F

FortiGate 3401E

FortiGate 41F

FortiGate 60F

FortiGate 400E

FortiGate 3600E

FortiGate 41F-3G4G

FortiGate 61F

FortiGate 401E

FortiGate 3601E

FortiWiFi 40F

FortiWiFi 60F

FortiGate 600E

 

FortiWiFi 40F-3G4G

FortiWiFi 61F

FortiGate 601E

 

Downloading a firmware image

Firmware images for all FortiGate units are available on the Fortinet Customer Service & Support website.

To download firmware:
  1. Log into the support site with your user name and password.
  2. Go to Download > Firmware Images.

    A list of Release Notes is shown. If you have not already done so, download and review the Release Notes for the firmware version that you are upgrading your FortiGate unit to.

  3. Select the Download tab.

  4. Navigate to the folder for the firmware version that you are upgrading to.
  5. Find your device model from the list. FortiWiFi devices have file names that start with FWF.
  6. Click HTTPS in the far right column to download the firmware image to your computer.

note icon

Firmware can also be downloaded using FTP, but as FTP is not an encrypted file transferring protocol, HTTPS downloading is recommended.

FortiOS image signing and verification

Official FortiOS firmware images are signed by the Fortinet CA. The BIOS checks the validity of an image when it is uploaded to the device. If the image is not signed by the Fortinet CA, a warning message is shown in the GUI.

Unsigned image:

Signed image:

This functionality is implemented on the following devices:

FortiGate 40F

FortiWiFi 41F

FortiGate 100F

FortiGate 3400E

FortiGate 40F-3G4G

FortiWiFi 41F-3G4G

FortiGate 101F

FortiGate 3401E

FortiGate 41F

FortiGate 60F

FortiGate 400E

FortiGate 3600E

FortiGate 41F-3G4G

FortiGate 61F

FortiGate 401E

FortiGate 3601E

FortiWiFi 40F

FortiWiFi 60F

FortiGate 600E

 

FortiWiFi 40F-3G4G

FortiWiFi 61F

FortiGate 601E