我们有一个运行在内部networking上的Linux主机的机器人只连接到Win7主机。 Win7主机可以访问互联网，但Linux主机不支持。 （历史原因）
当我在Win7上从Meinberg加载NTPD时，它与networking服务器同步就好了（w32时间服务被禁用）。 但是，Linux客户端无法与该win7服务器同步。 我的桌面Linux与互联网同步也无法与该WIN7服务器同步。
**trying from Linux to Windows** root@os-linux:~# ntpdate -dvu 192.168.128.118 15 Dec 14:30:13 ntpdate[2124]: ntpdate [email protected] Fri Oct 23 16:45:28 UTC 2015 (1) Looking for host 192.168.128.118 and service ntp host found : robot-10424.ith.local transmit(192.168.128.118) transmit(192.168.128.118) transmit(192.168.128.118) transmit(192.168.128.118) transmit(192.168.128.118) 192.168.128.118: Server dropped: no data server 192.168.128.118, port 123 stratum 0, precision 0, leap 00, trust 000 refid [192.168.128.118], delay 0.00000, dispersion 64.00000 transmitted 4, in filter 4 reference time: 00000000.00000000 Sun, Dec 31 1899 16:00:00.000 originate timestamp: 00000000.00000000 Sun, Dec 31 1899 16:00:00.000 transmit timestamp: da1b12fb.91411c7f Tue, Dec 15 2015 14:30:19.567 filter delay: 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 filter offset: 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 delay 0.00000, dispersion 64.00000 offset 0.000000 15 Dec 14:30:21 ntpdate[2124]: no server suitable for synchronization found inheritance人win7（NTPD服务器）conf内容….
# /etc/ntp.conf, configuration for ntpd; see ntp.conf(5) for help driftfile /var/lib/ntp/ntp.drift # Enable this if you want statistics to be logged. #statsdir /var/log/ntpstats/ statistics loopstats peerstats clockstats filegen loopstats file loopstats type day enable filegen peerstats file peerstats type day enable filegen clockstats file clockstats type day enable # Specify one or more NTP servers. # Use servers from the NTP Pool Project. Approved by Ubuntu Technical Board # on 2011-02-08 (LP: #104525). See http://www.pool.ntp.org/join.html for # more information. #server 0.ubuntu.pool.ntp.org #server 1.ubuntu.pool.ntp.org #server 2.ubuntu.pool.ntp.org #server 3.ubuntu.pool.ntp.org server 192.168.128.118 # Use Ubuntu's ntp server as a fallback. server ntp.ubuntu.com # Access control configuration; see /usr/share/doc/ntp-doc/html/accopt.html for # details. The web page <http://support.ntp.org/bin/view/Support/AccessRestrictions> # might also be helpful. # # Note that "restrict" applies to both servers and clients, so a configuration # that might be intended to block requests from certain clients could also end # up blocking replies from your own upstream servers. # By default, exchange time with everybody, but don't allow configuration. restrict -4 default kod notrap nomodify nopeer noquery restrict -6 default kod notrap nomodify nopeer noquery # Local users may interrogate the ntp server more closely. restrict 127.0.0.1 restrict ::1 # Clients from this (example!) subnet have unlimited access, but only if # cryptographically authenticated. #restrict 192.168.123.0 mask 255.255.255.0 notrust # If you want to provide time to your local subnet, change the next line. # (Again, the address is an example only.) #broadcast 192.168.123.255 # If you want to listen to time broadcasts on your local subnet, de-comment the # next lines. Please do this only if you trust everybody on the network! #disable auth #broadcastclient
win7 ntp.conf
# NTP Network Time Protocol # **** ATTENTION ****: *You have to restart the NTP service when you change this file to activate the changes* # PLEASE CHECK THIS FILE CAREFULLY AND MODIFY IT IF REQUIRED # Configuration File created by Windows Binary Distribution Installer Rev.: 1.27 mbg # please check http://www.ntp.org for additional documentation and background information # restrict access to avoid abuse of NTP for traffic amplification attacks # see http://news.meinberg.de/244 for details #restrict default noquery nopeer nomodify notrap #restrict -6 default noquery nopeer nomodify notrap # allow status queries and everything else from localhost restrict 127.0.0.1 restrict -6 ::1 # if you need to allow access from a remote host, you can add lines like this: restrict 192.168.128.36 mask 255.255.0.0 # Use drift file driftfile "c:\Program Files\NTP\etc\ntp.drift" # your local system clock, could be used as a backup # (this is only useful if you need to distribute time no matter how good or bad it is) #server 127.127.1.0 # but it should operate at a high stratum level to let the clients know and force them to # use any other timesource they may have. #fudge 127.127.1.0 stratum 12 # Use a NTP server from the ntp pool project (see http://www.pool.ntp.org) # Please note that you need at least four different servers to be at least protected against # one falseticker. If you only rely on internet time, it is highly recommended to add # additional servers here. # The 'iburst' keyword speeds up initial synchronization, please check the documentation for more details! server 0.pool.ntp.org iburst minpoll 6 maxpoll 7 server 1.pool.ntp.org iburst minpoll 6 maxpoll 7 server 2.pool.ntp.org iburst minpoll 6 maxpoll 7 server 3.pool.ntp.org iburst minpoll 6 maxpoll 7 server 4.pool.ntp.org iburst minpoll 6 maxpoll 7 # Use specific NTP servers server 3.north-america.pool.ntp.org iburst minpoll 6 maxpoll 7
感谢瑞安，ntpd必须被添加到Windows防火墙列表中。 事后显而易见，但我不认为Windows新手。