Epson WF-C5890 Series User Manual page 139

Preparing the Printer and Making Initial Settings
Web browser does not support the Encryption Strength for SSL/TLS.
Solutions
SSL/TLS has the Encryption Strength. You can open Web Config by using a web browser that supports
bulk encryptions as indicated below. Check you are using the a supported browser.
❏ 80bit: AES256/AES128/3DES
❏ 112bit: AES256/AES128/3DES
❏ 128bit: AES256/AES128
❏ 192bit: AES256
❏ 256bit: AES256
CA-signed Certificate is expired.
Solutions
If there is a problem with the expiration date of the certificate, "The certificate has expired" is displayed
when connecting to Web Config with SSL/TLS communication (https). If the message appears before its
expiration date, make sure that the printer's date is configured correctly.
The common name of the certificate and the printer do not match.
Solutions
If the common name of the certificate and the printer do not match, the message "The name of the
security certificate does not match···" is displayed when accessing Web Config using SSL/TLS
communication (https). This happens because the following IP addresses do not match.
❏ The printer's IP address entered to common name for creating a Self-signed Certificate or CSR
❏ IP address entered to web browser when running Web Config
For Self-signed Certificate, update the certificate.
For CA-signed Certificate, take the certificate again for the printer.
The proxy server setting of local address is not set to web browser.
Solutions
When the printer is set to use a proxy server, configure the web browser not to connect to the local
address via the proxy server.
❏ Windows:
Select Control Panel > Network and Internet > Internet Options > Connections > LAN settings >
Proxy server, and then configure not to use the proxy server for LAN (local addresses).
❏ Mac OS:
Select System Preferences > Network > Advanced > Proxies, and then register the local address for
Bypass proxy settings for these Hosts & Domains.
Example:
192.168.1.*: Local address 192.168.1.XXX, subnet mask 255.255.255.0
192.168.*.*: Local address 192.168.XXX.XXX, subnet mask 255.255.0.0
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Problems when Making Settings
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