[Home] screen on the operation panel [Menu] [Preferences] [Network][Firewall Settings] [IPv6 Address Filter] [Outbound Filter] or [Inbound Filter][Off] Restart the machine.To Disable MAC Address Filter[Home] screen on the operation panel [Menu] [Preferences] [Network][Firewall Settings] [MAC Address Filter] [Outbound Filter] or [Inbound Filter][Off] Restart the machine.2 Configure the firewall correctly. Setting the Firewall(P. 302)Reinstalling the Printer DriverUninstall the installed driver, and then reinstall it.For details about uninstalling and installing drivers, see the driver manual at the online manual site.https://oip.manual.canon/Are You Using Resident Software?If you are using resident software, such as security software, disable it and then try printing.Can You Print from Another Computer in the Network?If you cannot print from another computer, contact your dealer or service representative. If the ProblemPersists(P. 579)Troubleshooting537