DescriptionEven when following the recommended upgrade path, some settings may be lost after the upgrade due to a difference in supported features between the firmware versions.
SolutionThe following command can be used in order to list configuration errors resulted during the upgrade process and boot up.
# diagnose debug config-error-log read
An example of a commonly reported error is as follows:
>>> "unset" "post-lang" @ root.firewall.profile-protocol-options.scan.ftp:command parse error (error -61)
The line above indicates an issue with the parameter "post-lang", inside the FTP configuration of a firewall Proxy Options profile called "scan". Here is the CLI configuration section:
config firewall profile-protocol-options
edit scan
config ftp
unset post-lang
...
The next suitable step would be to confirm in the CLI Guide of the particular FortiOS firmware version whether the parameter 'post-lang' still exists, was removed, or renamed.
