ntpd 的配置

loginandir

我想做一下NTP的时间服务器，首先我的服务器要能连到一个外部的时间服务器来校准本机的时间，第二部在用本机做成局域网内的一台时间服务器，让局域网内的其它计算机到本机上同步时间，
下面是我的要做NTP服务器中的ntp.conf配置文件应该怎么改呢？请各位高手帮助一下。服务器可以上外网：本机IP为192.168.0.209  局域网内的是：192.168.0.0段地址。

# 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

# 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

# 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

server s1a.time.edu.cn
server ntp.sjtu.edu.cn
server s2c.time.edu.cn

#broadcast 192.168.1.255 key 42     #broadcast server
#broadcastclient            # broadcastclient
#broadcast 224.0.1.1 key 42     #multicast server
#multicastclient 224.0.1.1      #multicast client
#manycastserver 239.255.254.254     #manycast server
#manycastclient 239.255.254.254 key 42  #manycast client
manycastserver 3.cn.pool.ntp.org       manycast server
manycastclient 192.168.0.209 key 42    manycast client
# Undisciplined Local Clock. This is a fake driver intended for backup
# and when no outside source of synchronized time is available.
fudge   127.127.1.0 stratum 0

# Drift file.  Put this in a directorywhich the daemon can write to.
# No symbolic links allowed, either, since the daemon updates the file
# by creating a temporary in the same directory and then rename()'ing
# it to the file.
driftfile /var/lib/ntp/drift

# 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
restrict s1a.time.edu.cn mask 255.255.255.255 nomodify notrap noquery
server s1a.time.edu.cn
server s1c.time.edu.cn
restrict s1c.time.edu.cn mask 255.255.255.255 nomodify notrap noquery

cryboy2001

这个网上很多的，做好后注意开防火强就可以了。

woxizishen

给你个我之前写的说明吧。

restrict default kod nomodify notrap nopeer noquery 
restrict -6 default kod nomodify notrap nopeer noquery
拒絕默認所有ipv4和ipv6用戶訪問本ntp服務器。



restrict 127.0.0.1            放行本機ipv4來源
restrict-6 ::1                 放行本機ipv6來源

driftfile /var/lib/ntp/drift

broadcastdelay 0.008            廣播延遲
#broadcast      默認廣播所有網段，不設定可以不予理會。
#authenticate yes 訪問需要認證，這裡不需要啦。  
#keys /etc/ntp/keys 存放密鑰文件，這裡不需要啦


restrict 210.72.145.44           允許上層時間服務器能夠與你通信
restrict 64.4.10.33

restrict 172.16.0.0 mask 255.255.0.0 nomodify  放行一個B類網段能夠同步時間
restrict 172.16.9.185                          放行一台主機能夠同步時間

server 210.72.145.44 prefer       設定同步的上層時間服務器
server 64.4.10.33

當無法與上層同步，則本機就與自己同步為客戶端提供時間同步服務。
server 127.127.1.0     # local clock
fudge  127.127.1.0 stratum 10