driftfile /var/db/ntp.drift

restrict default nomodify notrust
restrict 127.0.0.1

server 0.pool.ntp.org iburst
restrict 0.pool.ntp.org

server 1.pool.ntp.org iburst
restrict 1.pool.ntp.org

server 2.pool.ntp.org iburst
restrict 2.pool.ntp.org

restrict 192.168.1.0 mask 255.255.255.0 nomodify notrap