Upgrade Information
Upgrading from FortiController-5000 5.2.6
FortiController-5000 5.2.10 supports upgrade from 5.2.6 and above.
Downgrading to previous firmware versions
Downgrading from FortiController-5000 5.2.10 to previous releases is not supported.
Firmware image checksums
The MD5 checksums for all Fortinet software and firmware releases are available at the Customer Service & Support portal, https://support.fortinet.com. After logging in select Download > Firmware Image Checksums, enter the image file name including the extension, and select Get Checksum Code.