Troubleshooting Tip: Cannot generate ACME certificate when using uppercase letters on the FortiGuard ddns-domain

This issue occurs when using uppercase letters on the FortiGuard ddns-domain and affects FortiOS 7.0.

config system ddns

    edit 1

        set ddns-server FortiGuardDDNS

        set ddns-domain "FORTIpaulo.fortiddns.com"

        set monitor-interface "port1"

    next

end

This is a known issue in FortiOS 7.0 and matches bug 813987. The solution is to upgrade the FortiGate to 7.2.1 or higher.

There is no fix in FortiOS 7.0. The workaround is to use lowercase letters on the FortiGuard ddns-domain.

config system ddns

    edit 1

        set ddns-domain "fortipaulo.fortiddns.com"

    next

end