| Description | This article describes how to process when the errors: 'This Firmware image didn't pass the signature verification.' and 'Firmware upload failed' are encountered when trying to upgrade the firmware image. |
| Scope | FortiGate. |
| Solution |
Sample error:
Unable to upgrade firmware even when the checksum of the firmware that has been downloaded from the Customer Service and Support web portal is verified. When checked, the security level of the firewall is set to High.
The method of upgrading the firewall is by File Upload. Even with the use of other browsers, error messages are still the same. When this happens, try to use a different method of upgrading the firmware that is discussed in Technical Tip How to upgrade FortiGate firmware before proceeding with lowering the BIOS security on a FortiGate via console port. |
