{"id":18117,"date":"2013-12-23T11:14:09","date_gmt":"2013-12-23T03:14:09","guid":{"rendered":"https:\/\/2blog.ilc.edu.tw\/25793\/2013\/12\/23\/%e6%9e%b6%e8%a8%ad-ntp-time-server\/"},"modified":"2013-12-23T11:14:09","modified_gmt":"2013-12-23T03:14:09","slug":"%e6%9e%b6%e8%a8%ad-ntp-time-server","status":"publish","type":"post","link":"https:\/\/2blog.ilc.edu.tw\/25793\/2013\/12\/23\/%e6%9e%b6%e8%a8%ad-ntp-time-server\/","title":{"rendered":"\u67b6\u8a2d NTP Time Server"},"content":{"rendered":"

\u6642\u9593\u5c0d\u65bc Server\u00a0\u4f86\u8aaa\u662f\u975e\u5e38\u91cd\u8981\uff0c\u8209\u51e1\u6392\u7a0b\u3001\u5099\u4efd\uff0c\u5982\u679c\u6642\u9593\u4e0d\u5c0d\uff0c\u53ef\u80fd\u6703\u9020\u6210\u4e00\u4e9b\u554f\u984c\uff0c\u6240\u4ee5\u4e00\u822c\u90fd\u6703\u5728 cron\u00a0\u4e2d\u6392\u7a0b\uff0c\u81ea\u52d5\u5c0d\u6642\u3002
\u5e95\u4e0b\u662f\u6bcf\u5929\u665a\u4e0a 12:00\u00a0\u81ea\u52d5\u5c0d\u6642
# crontab -l<\/span>
0 0 * * * \/usr\/sbin\/ntpdate -s time.stdtime.gov.tw;\/sbin\/hwclock -w<\/span>[@more@]\u4f46\u5982\u679c Server\u00a0\u7684\u6578\u91cf\u975e\u5e38\u7684\u591a\uff0c\u6240\u6709\u7684 Server\u00a0\u90fd\u8981\u5c0d\u5916\u5c0d\u6642\uff0c\u6bd4\u8f03\u65b9\u4fbf\u662f\u5728\u5167\u90e8\u7db2\u8def\u4e2d\u81ea\u884c\u67b6\u8a2d NTP Time Server\u3002
\u5e95\u4e0b\u662f\u5b89\u88dd\u6b65\u9a5f
1.\u00a0\u5b89\u88dd ntp\u00a0\u5957\u4ef6
# yum install ntp<\/span><\/p>\n

2.\u00a0\u4fee\u6539 \/etc\/ntp.conf\u00a0\u8a2d\u5b9a\u6a94
# vim \/etc\/ntp.conf<\/span>
\u52a0\u4e0a\u53ef\u4ee5\u4f7f\u7528\u9019\u4e00\u53f0 NTP Time Server\u00a0\u7684\u7db2\u6bb5
nomodify\u00a0\u7528\u6236\u7aef\u4e0d\u80fd\u66f4\u6539 NTP Time Server\u00a0\u7684\u6642\u9593\u53c3\u6578
notrap\u00a0\u4e0d\u63d0\u4f9b trap\u00a0\u9019\u500b\u9060\u7aef\u4e8b\u4ef6\u767b\u9304\u7684\u529f\u80fd
# Hosts on local network are less restricted.
restrict 192.168.1.0 mask 255.255.255.0 nomodify notrap<\/span><\/p>\n

\u6307\u5b9a\u8981\u548c\u9060\u7aef NTP Time Server \u9032\u884c\u6642\u9593\u540c\u6b65\u7684 Server\uff0cprefer \u8868\u793a\u512a\u5148\u4f7f\u7528\u7684\u4e3b\u6a5f
server tock.stdtime.gov.tw perfer<\/span>
server csie.cyut.edu.tw<\/span>
server watch.stdtime.gov.tw<\/span>
server time.stdtime.gov.tw<\/span>
server clock.stdtime.gov.tw<\/span><\/p>\n

3.\u00a0\u4fee\u6539 \/etc\/sysconfig\/ntpd\uff0c\u8a2d\u5b9a BIOS\u00a0\u7684\u6642\u9593\u4e5f\u540c\u6b65\u8abf\u6574
# vim \/etc\/sysconfig\/ntpd<\/span>
# Drop root to id ‘ntp:ntp’ by default.<\/span>
OPTIONS=”-u ntp:ntp -p \/var\/run\/ntpd.pid -g”<\/span>
SYNC_HWCLOCK=yes<\/span><\/p>\n

4. \u555f\u52d5 NTP Time Server
# service ntpd start<\/span><\/p>\n

5.\u00a0\u8a2d\u5b9a\u958b\u6a5f\u6642\u555f\u52d5
# chkconfig –level 3 ntpd on<\/span><\/p>\n

6.\u00a0\u6aa2\u67e5\u662f\u5426\u6709\u6b63\u5e38\u555f\u52d5
# netstat -tulnp | grep 123<\/span>
udp\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0\u00a0\u00a0\u00a0\u00a0\u00a0 0 192.168.1.109:123\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0.0.0.0:*\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 8829\/ntpd<\/span>
udp\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0\u00a0\u00a0\u00a0\u00a0\u00a0 0 127.0.0.1:123\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0.0.0.0:*\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 8829\/ntpd<\/span>
udp\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0\u00a0\u00a0\u00a0\u00a0\u00a0 0 0.0.0.0:123\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0.0.0.0:*\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 8829\/ntpd<\/span>
udp\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0\u00a0\u00a0\u00a0\u00a0\u00a0 0 ::1:123\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 :::*\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 8829\/ntpd<\/span>
udp\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0\u00a0\u00a0\u00a0\u00a0\u00a0 0 :::123\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 :::*\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 8829\/ntpd<\/span><\/p>\n

7.\u00a0\u5728\u9632\u706b\u7246\u4e2d\u8a2d\u5b9a
iptables -A INPUT -p UDP -s 192.168.1.0\/24 –dport 123 -j ACCEPT<\/span><\/p>\n

8. \u5728\u5225\u53f0 Server\u00a0\u4e2d\u505a\u6e2c\u8a66
\u76ee\u524d\u6642\u9593
# date<\/span>
\u4e00 12\u6708 23 11:45:18 CST 2013<\/span><\/p>\n

9.\u00a0\u96a8\u4fbf\u66f4\u6539\u4e00\u500b\u6642\u9593
# date 072816332011<\/span>
\u56db\u00a0 7\u6708 28 16:33:00 CST 2011<\/span><\/p>\n

10.\u00a0\u9032\u884c\u5c0d\u6642
# \/usr\/sbin\/ntpdate -s 192.168.1.109<\/span><\/p>\n

11.\u00a0\u6aa2\u67e5\u6642\u9593\u662f\u5426\u6b63\u78ba
# date<\/span>
\u4e00 12\u6708 23 11:47:08 CST 2013<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

\u6642\u9593\u5c0d\u65bc Server\u00a0\u4f86\u8aaa\u662f\u975e\u5e38\u91cd\u8981\uff0c\u8209\u51e1\u6392\u7a0b\u3001\u5099\u4efd\uff0c\u5982\u679c\u6642\u9593\u4e0d\u5c0d\uff0c\u53ef\u80fd\u6703\u9020\u6210\u4e00\u4e9b\u554f\u984c\uff0c\u6240\u4ee5\u4e00\u822c\u90fd\u6703\u5728 cr … <\/p>\n

\u95b1\u8b80\u5168\u6587\u3008\u67b6\u8a2d NTP Time Server\u3009<\/span><\/a><\/p>\n","protected":false},"author":55,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[107],"tags":[],"class_list":["post-18117","post","type-post","status-publish","format-standard","hentry","category-c-72382"],"meta_key":{"_encloseme":["1"],"lt_post_id":["464205"]},"_links":{"self":[{"href":"https:\/\/2blog.ilc.edu.tw\/25793\/wp-json\/wp\/v2\/posts\/18117"}],"collection":[{"href":"https:\/\/2blog.ilc.edu.tw\/25793\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/2blog.ilc.edu.tw\/25793\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/2blog.ilc.edu.tw\/25793\/wp-json\/wp\/v2\/users\/55"}],"replies":[{"embeddable":true,"href":"https:\/\/2blog.ilc.edu.tw\/25793\/wp-json\/wp\/v2\/comments?post=18117"}],"version-history":[{"count":0,"href":"https:\/\/2blog.ilc.edu.tw\/25793\/wp-json\/wp\/v2\/posts\/18117\/revisions"}],"wp:attachment":[{"href":"https:\/\/2blog.ilc.edu.tw\/25793\/wp-json\/wp\/v2\/media?parent=18117"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/2blog.ilc.edu.tw\/25793\/wp-json\/wp\/v2\/categories?post=18117"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/2blog.ilc.edu.tw\/25793\/wp-json\/wp\/v2\/tags?post=18117"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}