You cannot arbitrarily jump from an old version to a new one (e.g., 6.0.x → 7.2.x directly). Fortinet requires following a to avoid configuration corruption.
file crept forward. While it moved, he meticulously saved the current config backups fortigate firmware download
firewalls are the backbone of network security for tens of thousands of organizations worldwide. However, owning the hardware is only half the battle. The real security comes from keeping the FortiOS operating system up to date. Searching for a FortiGate firmware download is simple in concept, but in practice, it is fraught with legal, technical, and operational risks. You cannot arbitrarily jump from an old version
Also download the (same name + .md5 or .sha256). but in practice
Downloading FortiGate firmware involves accessing the Fortinet Customer Service & Support portal