i think, FTP is to insecure to use. so i want that every of my customer can use SFTP instead. SFTP means "tunneling SSH" (i know, this is not 100% real, but near enough to say what i mean). this means, i need to allow every of my customer SSH. this is NOT what i want. so i need something like chrooted SSH with NO critical commands to execute. (ls or dir or something like this is ok, but not kill, ps, top, cronjobs or something "criminal" the user can do with the server.). i found in the configuration of ISPConfig something to activate chrooted SSH but what to do to activate? can anybody help?