In order to make ftp service work on your virtual servers, you may have to edit
/etc/virt.conf to enable some files that are needed. You will have to edit
the line:
ftp files = /etc/ftpaccess /etc/ftpusers /etc/ftpconversions /etc/ftphosts
Everytime a server is enabled, Virtfs copies the files from the main server (the
values from the ftp files value) to the virtual server. These files are not
hard linked as each server may need their own copy of these files. These files
are server dependant.