目前的设定，只支援有FS（Forward secrecy）的协定：
ECDH+AESGCM+AES128:ECDH+AES128:ECDH+AES256:DH+AES:DHE-RSA-CAMELLIA128-SHA:!3DES:!ADH:!AECDH:!DES:!DSS:!MD5