Epson WorkForce Pro WF-C878RB User Manual page 526

Administrator Information
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
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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
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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
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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.
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Advanced Security Settings
526
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Solving Problems for Advanced Security