server 192.168.1.1 iburst prefer
server 192.168.1.2 iburst

restrict default ignore
restrict -6 default ignore
restrict 192.168.1.1 nomodify nopeer noquery notrap
restrict 192.168.1.2 nomodify nopeer noquery notrap
restrict 127.0.0.1
restrict -6 ::1

leapfile "/var/db/ntpd.leap-seconds.list"