SSL certificate verification failed

Rule from ssl under security category

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The certificate provide was unable to be verified this could mean a few things (amongst others):

  • The certificate has expired
  • The certificate itself has been revoked
  • The Certificate Authority that created the certificate is no longer trusted (happens more than you think)
  • The server is missing a required intermediate certificate to valid the certificate

See for a list of Certificate Authority included in browsers like Firefox.

How do I fix this ?

By either buying a new certificate for the domains from a Certificate Authority, making sure to include all the required domains.

Newer options include free certificates from Let's Encrypt which will provide a actual signed certificate that can be used for local/internal and public sites.

Providers like Cloudflare have also started providing SSL certificates for any websites going through their proxy, making it easy to give any website HTTPS if there is no control over the actual web server.

Resources

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