ntp.conf

server ntp1 iburst
server ntp2 iburst
driftfile /var/lib/ntp/ntp.drift
statistics loopstats peerstats clockstats
filegen loopstats file loopstats type day enable
filegen peerstats file peerstats type day enable
filegen clockstats file clockstats type day enable
restrict -4 default kod notrap nomodify nopeer noquery
restrict 127.0.0.1
restrict 10.0.0.0 mask 255.0.0.0