Verify your SSL certificate installation with the help of the following diagnostic tools:
http://www.digicert.com/help/
http://www.sslshopper.com/ssl-checker.html#hostname=forum.likg.org.ua
http://certlogik.com/ssl-checker/
https://www.ssllabs.com/ssltest/
https://knowledge.rapidssl.com/support/ssl-certificate-support/index?page=content&id=SO9556&actp=RELATED_RESOURCE&actp=RELATED_RESOURCE&actp=RELATED_RESOURCE
https://verifyssl.com/verify
https://www.geocerts.com/ssl_checker
https://ssltools.geotrust.com/checker/views/certCheck.jsp
http://tools.maxcdn.com/ssl
https://sslanalyzer.comodoca.com/
https://www.htbridge.com/ssl/
CLI:
https://testssl.sh/
Check CSR:
http://www.thawte.nl/en/support/test+your+csr/
https://ssltools.geotrust.com/checker/views/csrCheck.jsp
http://notary.icsi.berkeley.edu/
https://crt.sh/
Chech CRL and OCSP status:
https://certificate.revocationcheck.com
Check if a website properly supports the SPDY protocol:
http://spdycheck.org/
Mozilla SSL Configuration Generator
Generate Secure Configuration with `sslmate mkconfig`