You cannot "jump" directly from an old version like 5.0 to 6.0.14 without risking a configuration crash. You must follow a specific sequence.
config system global set admin-concurrent-login disable set admin-https-redirect enable set anti-replay strict set memory-use-threshold-extreme 85 set memory-use-threshold-red 75 set memory-use-threshold-green 60 set failtime 5 set tftp enable # only if needed end
The latest and final firmware version supported for the FortiGate 200D FortiOS 6.0.17 . Because this model has reached its official End of Service Life (EOSL) May 22, 2023
The 200D on is like a 2018 Land Cruiser with 200k miles. It doesn’t have a massage seat or self-parking, but it will run through a brick wall, then ask for more.
The 200D's CPU acceleration for SSL is limited. High-quality firmware releases have backported fixes for TLS 1.3 handshake errors that plagued earlier builds.
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