Steps to upgrade Fortigate Firewall.1. Visithttps://docs.fortinet.com/upgrade-tool 2. Select your current FortiGate product, FortiOS Version, and Select What FortiOS Version you want to upgrade.
3.
Click on
GO
it will show
Recommended Upgrade Path
you need to follow the path that is specified as above.
4.
You need to download all recommended Upgrade Path Firmware Version from
Fortinet support porta
Follow below heighted path to download-
5.
T
o download firmware image, click on HTTPS Checksum for your current FortiGate Product.
1.By using above step you can download all recommended Firmware versions step by step.
Now Login to your FortiGate Admin Dashboard.
Navigate to ----->System----->Firmware
Click on upload –
Select Firmware file
It will ask for confirmation for Backup after click on Backup and Upgrade.
Click on continue.
It will start Backup and Upgrade.
