To Secure mount point
Use mount options to help prevent intruders or your own users from executing program
For example /tmp cannot be used to execute program add -o nodev,noexec,nosuid /tmp or /wwwdata mount point in /etc/fstab
# mount -o nodev,noexec,nosuid /dev/sda2 /wwwdata
# mount -o nodev,noexec,nosuid /dev/hda3 /tmp
Above flags to mount, commands are available on both Linux (ext2/3) and FreeBSD file systems.
Secure ftp login using chroot feature, since you have not mentioned your ftp server I can't give exact info on this... however all modern ftp server has this feature so user ftp in they can't move to /tmp or something else...
Hope this helps