Canon i-SENSYS LBP6670dn User Manual page 480

NOTE
When you are using the IPP authentication function
If you are asked to enter the password, enter the user name and password, and then click [OK].
For details on the settings for the IPP authentication function, see
9
Follow the on-screen instructions to install the printer driver.
Downloaded from ManualsPrinter.com Manuals
"Configuring the Protocol Settings."