To disable your firewall application, see the documentation that came with your operating system.
On a terminal window, type the following, and then press Enter:
For most Linux distributions, you can open specific ports with the iptables command.
If there is an error verifying a security certificate before completing a scan, then accept the certificate to proceed.
You may accept the certificate for a single scan job or for all future scan jobs.
If
appears when sending a scan job to the printer, then you need to provide a valid user name and password.The user name and password combination is valid for a single scan job and all future scan jobs.