centos ntp 内网服务内网

参考

http://acooly.iteye.com/blog/1993484

对于一个联网的机器

service ntpd restartchkconfig ntpd on

如果在内网，一台机器想做ntp服务器

# 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 noqueryrestrict -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.#restrict 192.168.1.0 mask 255.255.255.0 nomodify notraprestrict 0.0.0.0 mask 0.0.0.0 nomodify notrap# Use public servers from the pool.ntp.org project.# Please consider joining the pool (http://www.pool.ntp.org/join.html).#server 0.centos.pool.ntp.org iburst#server 1.centos.pool.ntp.org iburst#server 2.centos.pool.ntp.org iburst#server 3.centos.pool.ntp.org iburst# 中国这边最活跃的时间服务器 : http://www.pool.ntp.org/zone/cnserver 210.72.145.44 perfer   # 中国国家受时中心server 202.112.10.36             # 1.cn.pool.ntp.orgserver 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# Enable public key cryptography.#cryptoincludefile /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

如果想做ntpclient，和本地的ntp服务器同步

ntpdate -u 10.9.62.11

或者

# 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 noqueryrestrict -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.#restrict 192.168.1.0 mask 255.255.255.0 nomodify notrap# Use public servers from the pool.ntp.org project.# Please consider joining the pool (http://www.pool.ntp.org/join.html).#server 0.centos.pool.ntp.org iburst#server 1.centos.pool.ntp.org iburst#server 2.centos.pool.ntp.org iburst#server 3.centos.pool.ntp.org iburstserver 10.9.62.11#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# Enable public key cryptography.#cryptoincludefile /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