Command line tool to check TLS/SSL ciphers, protocols and cryptographic flaws

 testssl.sh is a free command line tool which checks a server's service
 on any port for the support of TLS/SSL ciphers, protocols as well as
 recent cryptographic flaws and more.
 .
 Key features
 .
  * Clear output: you can tell easily whether anything is good or bad
 .
  * Ease of installation: It works for Linux, Darwin, FreeBSD and
   MSYS2/Cygwin out of the box: no need to install or configure
   something, no gems, CPAN, pip or the like.
 .
  * Flexibility: You can test any SSL/TLS enabled and STARTTLS service,
   not only webservers at port 443
 .
  * Toolbox: Several command line options help you to run YOUR test and
   configure YOUR output
 .
  * Reliability: features are tested thoroughly
 .
  * Verbosity: If a particular check cannot be performed because of a
   missing capability on your client side, you'll get a warning
 .
  * Privacy: It's only you who sees the result, not a third party
 .
  * Freedom: It's 100% open source. You can look at the code, see what's
   going on and you can change it. Heck, even the development is open
   (github)