★☆☆☆☆ (1/5) Security: 0/5 (no updates) Stability: 4/5 (for what it does) Features: 1/5 (severely obsolete)
If you must retain the FortiGate 200D temporarily, follow this strict upgrade path from older versions: fortigate 200d latest firmware
If budget is tight, consider virtualizing FortiGate-VM (which runs the latest firmware) on inexpensive hardware. fortigate 200d latest firmware