For production environments or active labs, you should aim for the latest build within the 6.2 release train. Fortinet categorizes its firmware into "Feature" and "Mature" tags.
: Look for the file specifically named for the (e.g., FGT_100D-v6-buildxxxx-FORTINET.out ).
Authorized administrators can access firmware directly via the Customer Service & Support portal. Go to . Log in with your registered credentials. Navigate to Support > Firmware Download . Fortigate 100d Firmware Download BEST
The highest and final stable firmware version supported by the FortiGate 100D FortiOS 6.2.15 Recommended Version
If you are a developer or in a lab environment, you can request access to legacy downloads via the FNDN program. For production environments or active labs, you should
Do you have an linked to your account?
Never allow HTTPS, HTTP, or SSH access to the management GUI from the WAN interface. Navigate to Support > Firmware Download
Firmware upgrades require a system reboot, causing temporary network disruption. Perform this during a maintenance window. Critical Lifecycle Warning: End of Support (EOS)
These builds contain the highest number of bug fixes and vulnerability patches available for this hardware. The Legacy Choice: FortiOS 6.0.x
Fortinet provides a "Firmware Upgrade Path" tool on the support site. Input your current version and your target version to see the step-by-step sequence.
Under the File Upload section, click and select the downloaded .out file corresponding to your next sequential step.