Cannot Create the Secure IPP Printing Port
The correct certificate is not specified as the server certificate for SSL/TLS communication.
If the specified certificate is not correct, creating a port may fail. Make sure you are using the correct certificate.
The CA certificate is not imported to the computer accessing the printer.
If a CA certificate is not imported to the computer, creating a port may fail. Make sure a CA certificate is imported.
Related Information
&
“Configuring a Server Certificate for the Printer” on page 509
Cannot Connect After Configuring IPsec/IP Filtering
The settings of IPsec/IP Filtering are incorrect.
Disable IPsec/IP filtering from the printer’s control panel. Connect the printer and computer and make the
IPsec/IP Filtering settings again.
Related Information
&
“Encrypted Communication Using IPsec/IP Filtering” on page 509
Cannot Access the Printer or Scanner after Configuring IEEE802.1X
The settings of IEEE802.1X are incorrect.
Disable IEEE802.1X and Wi-Fi from the printer’s control panel. Connect the printer and a computer, and then
configure IEEE802.1X again.
Related Information
&
“Configuring an IEEE802.1X Network” on page 521
Problems on Using a Digital Certificate
Cannot Import a CA-signed Certificate
CA-signed Certificate and the information on the CSR do not match.
If the CA-signed Certificate and CSR do not have the same information, the CSR cannot be imported. Check the
following:
❏
Are you trying to import the certificate to a device that does not have the same information?
Check the information of the CSR and then import the certificate to a device that has the same information.
❏
Did you overwrite the CSR saved into the printer after sending the CSR to a certificate authority?
Obtain the CA-signed certificate again with the CSR.
>
>
Solving Problems for Advanced Security
526
Summary of Contents for WF-C878R Series
Page 20: ...Part Names and Functions Front 21 Rear 25 ...
Page 35: ...Loading Paper Paper Handling Precautions 36 Paper Size and Type Settings 37 Loading Paper 38 ...
Page 313: ...Using Optional Items List of Optional Items 314 Printer Stand 315 Paper Cassette Unit 322 ...
Page 532: ...Where to Get Help Technical Support Web Site 533 Contacting Epson Support 533 ...