On Thu, Mar 3, 2011 at 12:38 PM, Yang Yang <dapiyang at gmail.com> wrote: > Hi,erverone > > i want to do a hosting business,and it is contain centos 5.5 ,php , nginx > ,mysql ,proftpd > > erver use contain a document like /home/htdocs/mike ,and he only use ftp and > see that document only As long as you're using FTP, you're dead in the water in security terms. FTP sends passwords in clear text and always yas. Switch to FTPS, WebDAV over HTTPS, or upgrade to OpenSSH 5.x and use SFTP with chroot cages.