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Why is my domain with CloudFlare not loading with error "Error 526: Invalid SSL certificate."

Roman Mcdougal
  • Updated

Symptoms

 

When trying to access a domain using CloudFlare, the site returns the following error:

 

Error 526: Invalid SSL certificate.

 

Description 

 

CloudFlare has a few different SSL modes, the main ones are:

  • Off
  • Flexible
  • Full

If the Full mode is in used the site would need to have a valid SSL certificate installed via cPanel >> Home >> Security >> SSL/TLS. This happens because Full requires a valid certificate In the backend server (cPanel). 

 

Workaround

 

If purchasing an SSL certificate is not an option, then the SSL mode must be changed to Flexible which encrypts the connection from the browser to Cloudflare but allows for insecure connections from CloudServer to the server. 

 

 

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