说明：  PROFTPD: ProFTPD是针对Wu-FTP(美国华圣顿大学开发的一个FTP服务器软件,曾经是主流ftp应用,现已很少使用.)的弱项而开发的，除了改进的安全性，还具备许多Wu-FTP没有的特点，能以Stand-alone、xinetd模式 运行等。ProFTP已经成为继Wu-FTP之后最为流行的FTP服务器软件，越来越多的站点选用它构筑安全高效的FTP站点,但启动缓慢,配置文件可能非常庞大,并存在一定的安全隐患:缓冲区溢出攻击（Buffer Overflow）、数据嗅探和匿名访问缺陷。
(PROFTPD: ProFTPD is Wu-FTP (USA and China developed at the University of St. Dayton an FTP server software, was ftp mainstream applications, is now rarely used.) Weakness developed, in addition to improved security, but also have many Wu-FTP no characteristics to Stand-alone, xinetd mode and so on. ProFTP has become the Wu-FTP, after following the most popular FTP server software, a growing number of sites chosen it to build a safe and efficient FTP site, but start slow, and configuration files can be very large, and there are some potential safety problems: buffer overflow attack (Buffer Overflow), data sniffer and anonymous access deficiencies.)