First look for a certificate provider who can provide a free SSL/TLS for Server certificate. I have searched and compiled a list of free certificates who can provide a free certificate for QNAP.

I will show you how to get the certificate and install these on the QNAP from startssl.com, with this you can get unlimited free renewals.

Please check the list below:

List of free SSL/TLS certificates:

  1. https://startssl.com/
  2. https://buy.wosign.com/free ( some time you get untrusted seller ).
  3. https://letsencrypt.org/ ( Auto install with Plesk ).
  4. https://www.digitalberg.com/ssl-certificates/ssl-price/ (from top provider).

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