sever conf配置

# For more information about this file, see the man pages

# ntp.conf(5), ntp_acc(5), ntp_auth(5), ntp_clock(5), ntp_misc(5), ntp_mon(5).
 
driftfile /var/lib/ntp/drift
 
# Permit time synchronization with our time source, but do not
# permit the source to query or modify the service on this system.
restrict default kod nomodify notrap nopeer noquery
restrict -6 default kod nomodify notrap nopeer noquery
 
# Permit all access over the loopback interface.  This could
# be tightened as well, but to do so would effect some of
# the administrative functions.
restrict 127.0.0.1
restrict -6 ::1
 
# Hosts on local network are less restricted.
# 允許內網其他機器同步時間
#restrict 192.168.1.0 mask 255.255.255.0 nomodify notrap
 restrict default nomodify
 
# Use public servers from the pool.ntp.org project.
# Please consider joining the pool (http://www.pool.ntp.org/join.html).
# 中國這邊最活躍的時間伺服器 : http://www.pool.ntp.org/zone/cn
server 210.72.145.44 perfer   # 中國國家受時中心
server 202.112.10.36             # 1.cn.pool.ntp.org
server 59.124.196.83             # 0.asia.pool.ntp.org
 
#broadcast 192.168.1.255 autokey        # broadcast server
#broadcastclient                        # broadcast client
#broadcast 224.0.1.1 autokey            # multicast server
#multicastclient 224.0.1.1              # multicast client
#manycastserver 239.255.254.254         # manycast server
#manycastclient 239.255.254.254 autokey # manycast client
 
# allow update time by the upper server 
# 允許上層時間伺服器主動修改本機時間
restrict 210.72.145.44 nomodify notrap noquery
restrict 202.112.10.36 nomodify notrap noquery
restrict 59.124.196.83 nomodify notrap noquery
 
# Undisciplined Local Clock. This is a fake driver intended for backup
# and when no outside source of synchronized time is available. 
# 外部時間伺服器不可用時，以本地時間作為時間服務
server  127.127.1.0     # local clock
fudge   127.127.1.0 stratum 10
 
# Enable public key cryptography.
#crypto
 
includefile /etc/ntp/crypto/pw
 
# Key file containing the keys and key identifiers used when operating
# with symmetric key cryptography. 
keys /etc/ntp/keys
 
# Specify the key identifiers which are trusted.
#trustedkey 4 8 42
 
# Specify the key identifier to use with the ntpdc utility.
#requestkey 8
 
# Specify the key identifier to use with the ntpq utility.
#controlkey 8
 
# Enable writing of statistics records.

#statistics clockstats cryptostats loopstats peerstats

client 配置

driftfile /var/lib/ntp/drift
restrict 127.0.0.1
restrict -6 ::1
 
server 172.16.0.86
 
restrict 172.16.0.86 nomodify notrap noquery
 
server  127.127.1.0     # local clock
fudge   127.127.1.0 stratum 10
 
includefile /etc/ntp/crypto/pw
 
keys /etc/ntp/keys