nmap --script ssl-enum-ciphers -p 443 example.com
openssl s_client -cipher aNULL -connect example.com:443
openssl s_client -cipher DES -connect example.com:443
openssl s_client -cipher 3DES -connect example.com:443
openssl s_client -cipher EXPORT -connect example.com:443
openssl s_client -cipher LOW -connect example.com:443
openssl s_client -cipher RC4 -connect example.com:443
openssl s_client -cipher NULL -connect example.com:443
# - Perfect Forward Secrecy Cipher (This should NOT fail):
openssl s_client -cipher EECDH, EDH NULL -connect example.com:443