Epson WF-C5890 Series

❏ CA Certicate
is is a certicate that is in chain of the CA-signed Certicate, also called the intermediate CA certicate. It is
used by the web browser to validate the path of the printer's certicate when accessing the server of the other
party or Web
Cong.
For the CA
Certicate,
set when to validate the path of server
certicate
accessing from the printer. For the
printer, set to certify the path of the CA-signed Certicate for SSL/TLS connection.
You can obtain the CA certicate of the printer from the Certication Authority where the CA certicate is
issued.
Also, you can obtain the CA certicate used to validate the server of the other party from the Certication
Authority that issued the CA-signed
Certicate
of the other server.
❏ Self-signed Certicate
is is a certicate that the printer signs and issues itself. It is also called the root certicate. Because the issuer
certies itself, it is not reliable and cannot prevent impersonation.
Use it when making the security setting and performing simple SSL/TLS communication without the CA-
signed
Certicate
.
If you use this
certicate
for an SSL/TLS communication, a security alert may be displayed on a web browser
because the certicate is not registered on a web browser. You can use the Self-signed Certicate only for an
SSL/TLS communication.
Related Information
& “Updating a Self-signed Certicate” on page 457
& “Conguring a CA Certicate” on page 458
Conguring a CA-signed Certicate
Obtaining a CA-signed Certicate
To obtain a CA-signed
certicate,
create a CSR
(Certicate
Signing Request) and apply it to
certicate
authority.
You can create a CSR using Web Cong and a computer.
Follow the steps to create a CSR and obtain a CA-signed certicate using Web Cong. When creating a CSR using
Web Cong, a certicate is the PEM/DER format.
1. Enter the printer's IP address into a browser to access Web Cong.
Enter the printer's IP address from a computer that is connected to the same network as the printer.
You can check the IP address of the printer from the following menu.
Settings > General Settings > Network Settings > Network Status > Wired LAN/Wi-Fi Status
2. Enter the administrator password to log in as an administrator.
3.
Select in the following order.
Network Security tab. > SSL/TLS > Certicate or IPsec/IP Filtering > Client Certicate or IEEE802.1X >
Client
Certicate
Whatever you choose, you can obtain the same certicate and use it in common.
4. Click Generate of CSR.
A CSR creating page is opened.
Administrator Information > Network Security Settings > Using a Digital Certicate
453