Oki B412dn User Manual page 590

Memo
Normally, do not select [Use SSL/TLS Certificate for EAP authentication].
9.
Enter the name of a certificate file
You can import a PKCS#12 file only.
10.
Enter the password of the certificate, and then click [OK].
The client certificate is imported to the printer.
11.
Select [Authenticate Server], and then click [Import].
Memo
If [Not authenticate Server] is selected, you do not need to import a CA certificate.
If [Not authenticate Server] is selected, whether a connection is established to the correct authentication server is not
checked.
12.
Enter the name of the CA certificate file, and then click [OK].
Specify the certificate that is issued by the certificate authority and the RADIUS server obtains. You can import a PEM, DER, or
PKCS#7 file.
The CA certificate is imported to the printer.
13.
Click [Submit].
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