Troubleshooting
Troubleshooting an expired website certificate
Find the certificate visitors are seeing, separate failed renewal from failed deployment, and verify the repaired endpoint.
THE READING ROOM
Troubleshooting
Troubleshooting
Diagnosing a certificate hostname mismatch
Compare the requested hostname with the certificate's SAN coverage, then trace DNS, virtual hosting and CDN configuration.
Troubleshooting
Finding certificate chain problems
Separate the certificates a server sends from the trust decisions a client makes, then locate missing intermediates or trust-store issues.