http://www.ietf.org/rfc/rfc2246.txt
OpenSSL,一个广为应用的SSL实现:
http://www.openssl.org
支持ssl ftp的ftp client:
http://www.ford-hutchinson.com/~fh-1-pfh/ftps-ext_col.html#client
支持ssl ftp的ftp server:
http://www.ford-hutchinson.com/~fh-1-pfh/ftps-ext_col.html#server
http://www.openssl.org