: Always perform a System > Configuration > Backup before starting.
From your logged-in portal homepage, click on Support > Firmware Download . This opens the image download page.
Using an EOL firewall in a production environment is a security risk. The final firmware you have worked so hard to acquire will eventually become a legacy attack target. Fortigate 100d Firmware Download BEST
The FortiGate 100D is an older hardware generation. Knowing its lifecycle limitations is crucial when choosing the best firmware. Hardware Limitations & EOS Dates
If you cannot legally obtain the 5.4.13 firmware because your support contract expired a decade ago, you have two options: : Always perform a System > Configuration >
Installing any firmware above 6.0.x will brick the device.
Fortinet firmware is not available via public mirrors and must be obtained through the official support portal. Fortigate 100D Best & Latest stable firmware Using an EOL firewall in a production environment
When a device reaches , Fortinet ceases all official support, stops releasing security patches, and no longer provides RMA (Return Merchandise Authorization) services. Running an EOL/EOSL device exposes your network to unpatched vulnerabilities. The recommendation is to immediately plan a migration to a currently supported model. Fortinet’s TradeUp program allows you to transfer your existing FortiCare and FortiGuard subscriptions to a new hardware model.
: In the drop-down selection menu, change the product type to FortiGate .
Rollback options