Directory for virtual ftp host 11.. PPrriinncciipplleess Virtual host ftp provides anonymous ftp access for different domains on a single server. To provide a higher level of security, each virtual host is isolated in its own directory. Users can only view the relevant files own by this virtual host. They have no access to any other area of the server. To achieve this level of isolation, a minimal runtime must be installed in the virtual host directory. 22.. WWhhiicchh rruunnttiimmee The runtime is composed of various programs and libraries. Those file are distribution dependant. Linuxconf simply copies the environment for anonymous ftp. This provides the exact minimal runtime to operate an isolated virtual host. So the runtime is simply some part of the /var/ftp (on most distribution) into the virtual host directory.