Troubleshooting Tip: FortiGate Automatic Reboot Due to Federated Upgrade

To troubleshoot this issue, follow these steps:

1. Check the system event logs to identify the cause of the reboot. Go to Log & Report -> System Events -> General System Events.
   
    

2. Verify that the auto-firmware upgrade feature is disabled. Go to System -> Firmware -> Auto-Firmware Upgrade and ensure that the feature is disabled.
3. Check the federated upgrade settings. Go to System -> Federated Upgrade and verify that the upgrade is not scheduled. To confirm if an upgrade was invoked by a Federated Upgrade, refer to Technical Tip: How to confirm an upgrade was done by federated-upgrade feature.

In the CLI: 

config system federated-upgrade
    set status disabled
    set upgrade-id 0
    set next-path-index 0
end

4. If the federated upgrade is scheduled, cancel the upgrade. Run the following command in the CLI:

execute federated-upgrade cancel

Note: Even after disabling the auto-firmware upgrade feature, the firewall can get auto-upgraded with a federated upgrade due to an existing scheduled federated upgrade. To avoid this schedule upgrade, cancel it manually.