How to solve the problem that the revocation information of the site's security certificate is not available

When the revocation information of the website security certificate is not available, seven methods can be taken to solve the problem: verify the certificate status, check the OCSP server response, check the CRL distribution point, contact the certificate authority, update the certificate, enable HSTS, use CAA records.

Unable to access revocation information: Solution

Unavailability of revocation information for a website security certificate may cause the browser to Display security warnings to prevent users from accessing your site. Here's how to resolve this issue:

1. Verify certificate status

Use an online tool such as SSL Checker to verify that the certificate is still valid. If the certificate has expired or been revoked, continue with the following steps.

2. Check the OCSP server response

The Online Certificate Status Protocol (OCSP) server can provide information about the certificate revocation status. Make sure your website is properly configured to use OCSP responses and has a stable connection to the OCSP server.

3. Check the CRL Distribution Point (CDP)

A certificate revocation list (CRL) is a file that contains a list of revoked certificates. Check if your certificate specifies any CDPs and make sure they can be accessed.

4. Contact the Certificate Authority (CA)

Please contact the CA that issued the certificate. They can provide information about the certificate revocation status and help resolve any potential issues.

5. Update the certificate

If the certificate has expired or been revoked, you need to update it to a new certificate. Purchase a certificate from a trusted CA and properly configure your server to use the new certificate.

6. Enable HSTS

HTTP Strict Transport Security (HSTS) is a security protocol that forces browsers to only use HTTPS to access your website during a specific period of time . Enabling HSTS can help prevent downgrade attacks, where an attacker might redirect users to an unsecured domain.

7. Use CAA records

A Certificate Authority Authorization (CAA) record is a DNS record that specifies which CAs have the authority to issue certificates. Using CAA records can help prevent the issuance of fraudulent certificates.

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