Canon i-SENSYS LBP6670dn User Manual page 711

Either select the CA certificate file by clicking [Browse...], or enter the location where CA certificate file is stored.
4
Click [Start Installation].
The CA file installation starts.
To enable the printer to use the CA certificate installed on the printer, after the CA certificate installation is complete, refer
to "Registering CA Certificates in the
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Printer" and register the CA certificate in the printer.