# Use public servers from the pool.ntp.org project.
# Please consider joining the pool (http://www.pool.ntp.org/join.html).
server ntp1.sakura.ad.jp iburst

# Ignore stratum in source selection.
stratumweight 0

# Record the rate at which the system clock gains/losses time.
driftfile /var/lib/chrony/drift

# In first three updates step the system clock instead of slew
# if the adjustment is larger than 10 seconds.
makestep 10 3

# Enable kernel synchronization of the real-time clock (RTC).
rtcsync

# Allow NTP client access from local network.
#allow 192.168/16

# Listen for commands only on localhost.
bindcmdaddress 127.0.0.1
bindcmdaddress ::1

# Serve time even if not synchronized to any NTP server.
#local stratum 10

# Specify file containing keys for NTP and command authentication.
keyfile /etc/chrony.keys

# Specify key number for command authentication.
commandkey 1

# Generate new command key on start if missing.
generatecommandkey

# Disable logging of client accesses.
noclientlog

# Send message to syslog when clock adjustment is larger than 0.5 seconds.
logchange 0.5

# Specify directory for log files.
logdir /var/log/chrony

# Select which information is logged.
#log measurements statistics tracking

# This option allows you to configure the port on which chronyd will listen for NTP requests.
# The compiled in default is udp/123, the standard NTP port. If set to 0, chronyd will not open the server
# socket and will operate strictly in a client-only mode.
port 0

# User to which will chronyd switch on initialisation to drop root privileges.
user chrony

# Deny access to chronyc from other computers.
cmddeny all

# Lock chronyd into RAM so that it will never be paged out.
lock_all