/etc/rc.conf
ntpdate_enable=”YES”
ntpdate_flags=”-b”
ntpd_enable=”YES”


/etc/ntp.conf
restrict default ignore
driftfile /var/db/ntp.drift
server 0.pool.ntp.org
server 1.pool.ntp.org
server 2.pool.ntp.org
server pool.ntp.org