标签：ntp
A:10.240.210.233
B:10.240.180.171
C:10.240.210.60
A机器(ntp服务器端)
root@samba ~$ntpq -c version ntpq 4.2.6p5@1.2349-o Fri Jul 24 10:56:21 UTC 2015 (1)
B机器(客户端,centos5.5) 同步失败
root@extmail ~$ntpq -c version ntpq 4.2.2p1@1.1570-o Sat Dec 20 02:52:15 UTC 2014 (1) root@extmail ~$ntpdate 10.240.210.233 21 Aug 15:27:05 ntpdate[20107]: no server suitable for synchronization found
C机器(客户端，centos6.6) 执行成功
root@oldboy ~$ntpq -c version ntpq 4.2.6p5@1.2349-o Mon Mar 16 14:53:07 UTC 2015 (1) root@oldboy ~$ntpdate 10.240.210.233 21 Aug 15:21:50 ntpdate[10574]: adjust time server 10.240.210.233 offset -0.008637 sec
总结，B机器同步失败可能是ntp版本较低，可尝试将其版本升级，或降低服务器(A机器)的NTP版本。
【附】
ntp配置文件
root@samba ~$egrep -v "#|^\s*$" /etc/ntp.conf 指定NTP服务器日志文件 logfile /var/log/ntp driftfile /var/lib/ntp/drift restrict default kod nomodify notrap nopeer noquery restrict -6 default kod nomodify notrap nopeer noquery restrict 127.0.0.1 restrict -6 ::1 restrict 10.240.210.0 mask 255.255.255.0 nomodify notrap server tiger.sina.com.cn prefer server 202.112.10.36 restrict 202.112.10.36 nomodify notrap noquery server 127.127.1.0 fudge 127.127.1.0 stratum 10 includefile /etc/ntp/crypto/pw keys /etc/ntp/keys
标签：ntp
原文地址：http://xoyabc.blog.51cto.com/7401264/1686868
