SSL (443)

Default Port = 443

// Open a connection
>>> openssl s_client -connect $ip:443

// Basic SSL ciphers check
>>> nmap --script ssl-enum-ciphers -p 443 $ip

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Note : Look for unsafe ciphers such as Triple-DES and Blowfish

Note : Very complete tool for SSL auditing is testssl.sh, finds BEAST, FREAK, POODLE, heart bleed, etc...