Accessing the printer's web interface is necessary to change the Canon default password. Connect your computer to the same network as the printer and print a network setup sheet or use the printer's settings to obtain the printer's IP address. Open a web browser and type the IP address of the printer. To change the default password for administrative needs, go to the "Security" or "Password" area. To increase security and prevent unwanted access to your printer's settings, always use a strong, one-of-a-kind password.