start program = "/etc/init.d/vsftpd start"
stop program = "/etc/init.d/vsftpd stop"
if failed host 127.0.0.1 port 21 protocol ftp
start program = "/etc/init.d/vsftpd start"
stop program = "/etc/init.d/vsftpd stop"
if failed host 127.0.0.1 port 21 protocol ftp