Frequently asked questions


When visiting my website, users receive an error message: “ERR_SSL_VERSION_OR_CIPHER_MISMATCH.” Why?

If the visitors of your website see an error message “ERR_SSL_VERSION_OR_CIPHER_MISMATCH,” you should inform them about the browser requirements for the SSL certificate of your website:

  • Firefox 2 (on any OS)
  • Windows Vista or OS X 10.6: Chrome 5.0.342.0, Opera 14, Safari 4
  • Internet Explorer 7 on Windows Vista
  • Android 4.0
  • Mobile Safari on iOS 4.0
  • Windows Phone 7

Operating systems Windows XP and Android 3 do not support the free certificate “Let’s Encrypt”.

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