How to disable NTP option in VmWare Vsphere ESX 4.1 5.0 5.1 5.5 to prevent DDoS

sed -i 's/nopeer/nopeer noquery/' /etc/ntp.conf ; /etc/init.d/ntpd restart; /sbin/auto-backup.sh; cat /etc/ntp.conf

Run this command in shell.

Done.