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 39
Problems on Using a Digital Certificate
Cannot Import a CA-signed Certificate
Does the CA-signed certificate and the information on the CSR 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.
Is the CA-signed certificate more than 5KB?
You cannot import a CA-signed certificate that is more than 5KB.
Is the password for importing the certificate correct?
If you forget the password, you cannot import the certificate.
Related Information
& “Importing a CA-signed Certificate” on page 36
Cannot Update a Self-Signed Certificate
Has the Common Name been entered?
Common Name must be entered.
Have unsupported characters been entered to Common Name? For example, Japanese is not supported.
Enter between 1 and 128 characters of either IPv4, IPv6, host name, or FQDN format in ASCII (0x20-0x7E).
Is a comma or space included in the Common Name?
If a comma is entered, the Common Name is divided at that point. If only a space is entered before or after a comma, an
error occurs.
Related Information
& “Updating a Self-signed Certificate” on page 38
Network Guide
Solving Problems
56
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