http/2.0 will need encryption, also Google says HTTPS is a ranking signal – https://www.peterdavehello.org/2014/08/google-https-as-a-ranking-signal/, after set up https on our websever, what should we do next? It’s to confirm and make sure the cer and configure is safe enough to prevent from attack, here are some online testing service to help you confirm your cert and config on your webserver.

SSL Server Test by Qualys, Inc. SSL LABS (supports IPv6):
https://www.ssllabs.com/ssltest/

SSL Checker – SSL Certificate Verify:
https://www.sslshopper.com/ssl-checker.html

FairSSL BlueSSL Online Server SSL Test:
https://www.fairssl.se/en/ssltest

DigiCert® SSL Installation Diagnostics Tool – SSL Certificate Checker:
https://www.digicert.com/help/

Symantec CryptoReport SSL Checker
https://cryptoreport.websecurity.symantec.com/checker/views/certCheck.jsp

GeoCerts SSL Checker:
https://www.geocerts.com/ssl_checker

Wormly Free SSL Web Server Tester:
https://www.wormly.com/test_ssl

COMODO SSL Analyzer:
https://sslanalyzer.comodoca.com/

Networking4all Site Check, SSL Checker:
https://www.networking4all.com/en/support/tools/site+check/

ssl-tools.net web servers test (supports IPv6):
https://ssl-tools.net/webservers

MaxCDN SSL Checker:
http://tools.maxcdn.com/ssl/