## Printer stops scanning or prints a “Profile scan failed” page

### Disable any firewall application

To disable your firewall application, see the documentation that came with your operating system.

### Open the required scanning ports (tcp: 9751-9760)

On a terminal window, type the following, and then press Enter:

# iptables -I INPUT -p tcp --dport 9751:9760 -j ACCEPT -i eth0

For most Linux distributions, you can open specific ports with the iptables command.

### Accept the device certificate

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.

### Enter a valid scan job login

If 401 Unauthorized Error 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.