Registering the Printer's Root Certificate to a Web Browser for SSL Communication (Remote UI) - TS3320

Article ID: ART174926

Date published: 08/14/2019

Date last updated: 08/14/2019

Description

If the printer's root certificate has not been registered to the web browser, a message to warn you that the secure connection is not guaranteed may appear.

Solution

If the printer's root certificate has not been registered to the web browser, a message to warn you that the secure connection is not guaranteed may appear.

When you display Remote UI for the first time on your smartphone, tablet, or computer, download the root certificate, and then register it to the web browser. The secure connection will be confirmed and a message will not appear. However, the message may appear depending on a web browser even after you have registered the root certificate.

How to register the root certificate varies depending on the web browser.

For Internet Explorer
For Safari
For Chrome on Android
For Mobile Safari on iOS

Operating procedure may differ depending on the version of your web browser. For other web browser, refer to each help.

Important

Make sure that you have accessed to the printer IP address correctly by checking the URL field of the web browser before registering the root certificate.
If the printer is connected via IPv6 using Windows, you need to generate a server certificate using Remote UI.

For details, see Generating Server Certificate (Self-signed Certificate).

For Internet Explorer

Select Download on the Remote UI.

Downloading the root certificate is started.
If confirmation screen appears, select Open.

The Certificate screen is displayed.

Note
- To save the certificate file to your device and register it, select Save. Select Internet options from Tool menu of Internet Explorer, register the root certificate from Certificates on Content sheet.
Select Install Certificate.

The Certificate Import Wizard screen is displayed.
Select Next.
Select Place all certificates in the following store.
Select Browse.

The Select Certificate Store screen is displayed.
Select Trusted Root Certification Authorities and OK.
Select Next on the Certificate Import Wizard screen.
If Completing the Certificate Import Wizard appears, select Finish.

The Security Warning screen is displayed.
Make sure that the thumbprint on Security Warning screen matches the printer's thumbprint.

For printer's thumbprint, check the "Cert. Fingerprt(SHA-1)" column or the "Cert. Fingerprt(SHA-256)" column on the network information that was printed when you check the printer's IP address.
If the thumbprint on the Security Warning screen matches the printer's thumbprint, select Yes.
Select OK on the Certificate Import Wizard screen.

The root certificate registration is completed.

For Safari

Select Download on the Remote UI.

Downloading the root certificate is started.
Open the downloaded file.

The Add Certificates screen is displayed.
Select Add.
Make sure that the thumbprint of the certificate detail information matches the printer's thumbprint.

For printer's thumbprint, check the "Cert. Fingerprt(SHA-1)" column or the "Cert. Fingerprt(SHA-256)" column on the network information that was printed when you check the printer's IP address.
If the thumbprint of the certificate detail information matches the printer's thumbprint, select Always Trust.

The root certificate registration is completed.

Note
- If a password is set on your device, entering a password may be required.

For Chrome on Android

Select Download on Remote UI.

Downloading the root certificate is started and then the Name the certificate screen is displayed.
As entering the root certificate name is required, enter an arbitrary certificate name and select OK.

The root certificate registration is completed.

Note
- If a PIN or password is not set as the security type, the attention screen may appear. Select OK, and then set the security type to PIN or password.

After Root Certificate Registration

We recommend that you make sure that the correct root certificate has been registered.

To make sure that the correct root certificate has been registered, make sure that thumbprint of certificate information matches printer's thumbprint. Follow the steps below.

Note

Some Android devices cannot be checked the thumbprint of a registered route certificate.

From the Settings menu on your device, select Security, Trust credentials, and USER.

The list of downloaded certificates appears.
Select the downloaded certificate.

The certificate information appears.
Make sure that the thumbprint of the certificate information matches the printer's thumbprint.

For printer's thumbprint, check the "Cert. Fingerprt(SHA-1)" column or the "Cert. Fingerprt(SHA-256)" column on the network information that was printed when you check the printer's IP address.
If the thumbprint of the certificate information screen matches the printer's thumbprint, select OK.

The root certificate registration is completed.

If the message to warn you that the secure connection is not guaranteed appears when you select Log in in the Remote UI after registering the root certificate, restart the web browser. The message will not appear on the web browser.