Note: The reboot usually takes 3–5 minutes. Traffic will be dropped during this time unless you have a High Availability (HA) cluster. Option B: CLI via TFTP (Recovery Mode)
: Create a manual backup of your current configuration, including local certificates, before starting. This is your safety net if the upgrade fails. 2. Downloading the Firmware Image Official firmware must always be sourced from the Fortinet Customer Service & Support portal Downloading a firmware image | FortiGate / FortiOS 7.6.6 fortigate firmware download install