Error 403, SSL connection error, The page cannot be shown or Secure connection failed when accessing or signing a procedure on the internet
Skip information indexError 403. Firefox and Mac OS X with certificate
This is generally an identification error. It occurs when you try to access an option that requires an electronic certificate and the browser does not detect that one is installed, or it is not selected properly.
You must completely close the open browser session from the "Exit Firefox" option before following the rest of our recommendations.
To verify the installed electronic certificate, follow these steps:
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Check that the certificate is in the browser
If the electronic certificate is a cryptographic card (for example, DNIe ) close the browser, reconnect the reader and open the browser again to access the procedure.
If it is an electronic DNI follow the instructions on "Connection error with electronic DNI on Mac OS
If you have a software type certificate, go to "Firefox", "Preferences", "Privacy and security"; In the "Certificates" section, click on the "View certificates" button and check that the certificate is correctly installed. If the certificate installation is correct it should appear in the "Your certificates" tab.
If it is not installed here, check if the certificate is in "Keychain Access". If this is the case, you must make a copy of the certificate to import it into the Mozilla Firefox store.
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Check that the certificate is in Keychain Access
Access "Finder", "Applications", "Utilities", "Keychain Access"; In the "My certificates" section of "Login", the certificate appears.
If the certificate is installed, you must make a copy of it to later import it into Mozilla Firefox.
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How to export the electronic certificate
To do this, select the certificate and click on "File", "Export items" or "Export items", depending on the version.
Provide a name, a location, and for file formats, leave the “Personal Information Exchange (.p12)” option and click “Save.” A window may appear requesting that a password be set to protect the copy.
A password must be set and then entered when importing the copy into Mozilla Firefox.
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How to import the copy of the certificate in Mozilla Firefox
To import a certificate in Firefox it is necessary that the copy has been made with a password, since to install it in this browser it is mandatory to enter the "backup password".
Go to "Firefox", "Preferences", "Privacy and security". In the "Certificates" section, click on "View certificates". Check that the "Always ask" option is checked so that when accessing the page options that require it, the certificate selection is correct.
Go to the "Your certificates" tab and then click the "Import..." button. The extension of a valid copy of an electronic certificate in .pfx or .p12. Select it from the location where it is saved and press the "Open" button in the "Name of the file to restore" window.
The browser may ask you to enter the master password, which is the password for the certificate store of the Mozilla Firefox browser and by default comes unset; If you decide to establish it, keep in mind that forgetting it can cause the loss of the certificate. If there are none established, leave the field blank and click OK.
A new window will ask for the password you used to encrypt the backup. If everything is correct, the message "They have been successfully restored..." will appear.
Check the validity date of the certificate. If it is not valid, it will be necessary to request a new one.
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Validate the electronic certificate
If it is a software-type electronic certificate from the National Currency and Stamp Factory ( FNMT ) or an electronic DNI , you can validate the certificate from the "Verify status" option on the FNMT page.
If it is an electronic certificate type cryptographic card, it can be verified from the REDSARA website.
- In the case of certificates on a cryptographic card, if the result on the REDSARA page is an invalid certificate, it will be necessary to contact the entity issuing the certificate.
- If certificate validation is not possible ("Page cannot be displayed" message or similar), clear the recent browser history by checking all options except "Browsing and download history" and "Forms and search history".
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If the verification result is a valid certificate, clear the recent browser history with at least the "Cache" and "Active sessions" options.
In the event that the same error page continues to appear, after confirming that the certificate is working correctly, and if the Mozilla Firefox version is 56, follow the instructions in the link "Persistent error 403 with Mozilla 56 or computer crash on Mac."