server ntp.univ-lyon1.fr minpoll 5
server ntp1.tuxfamily.net minpoll 5
server ntp2.tuxfamily.net minpoll 5
server ntp1.theinternetone.net minpoll 5
server ntp2.theinternetone.net minpoll 5
server ntp3.theinternetone.net minpoll 5