Epson DS-790WN Administrator's Manual page 118

Advanced Security Settings
Messages
Invalid file.
Cannot use the Server Certificates that
include more than three CA
certificates.
The certificate has expired. Check if the
certificate is valid, or check the date
and time on the product.
Private key is required.
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Solving Problems for Advanced Security
Cause:
You are not importing a certificate file in X509 format.
What to do:
Make sure that you are selecting the correct certificate sent by a trusted certificate
authority.
Cause:
The file you have imported is too large. The maximum file size is 5KB.
What to do:
If you select the correct file, the certificate might be corrupted or fabricated.
Cause:
The chain contained in the certificate is invalid.
What to do:
For more information on the certificate, see the website of the certificate
authority.
Cause:
The certificate file in PKCS#12 format contains more than 3 CA certificates.
What to do:
Import each certificate as converting from PKCS#12 format to PEM format, or
import the certificate file in PKCS#12 format that contains up to 2 CA certificates.
Cause:
The certificate is out of date.
What to do:
❏ If the certificate is out of date, obtain and import the new certificate.
❏ If the certificate is not out of date, make sure the scanner's date and time are
set correctly.
Cause:
There is no paired private key with the certificate.
What to do:
❏ If the certificate is the PEM/DER format and it is obtained from a CSR using a
computer, specify the private key file.
❏ If the certificate is the PKCS#12 format and it is obtained from a CSR using a
computer, create a file that contains the private key.
Cause:
You have re-imported the PEM/DER certificate obtained from a CSR using Web
Config.
What to do:
If the certificate is the PEM/DER format and it is obtained from a CSR using Web
Config, you can only import it once.
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Problems on Using a Digital Certifi
Cause/What to do
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