NTP服务

liyaweihesmz

    RHEL6.3上NTP服务如何配置？？？

liyaweihesmz

回复 2# wupenhu


    我配置了好多次都没成功。查找了好多资料，配置都挺简单，我做了就是没结果。

liyaweihesmz

回复 4# chenyx


    NTP服务就是用来将系统时间与网络时间同步。客户机的时间不会与服务器的时间同步吧？？

liyaweihesmz

回复 6# chenyx


    我执行这个命令报错了啊，提示如下信息：
[root@wyh ~]# ntpdate 192.168.174.153
10 May 13:35:05 ntpdate[21420]: no server suitable for synchronization found
  我在网上查资料说等5分钟执行就可以了，但是我一直有这个错误提示。

liyaweihesmz

回复 7# sirense


   我一般是将防火墙关闭的。后来，我试着开启防火墙，然后添加了NTP服务器的端口123.所以端口是打开了。

liyaweihesmz

回复 8# wenhq
我查看日志信息中有如下信息。最后一行的提示信息我不清楚是杂回事了。

1. May 10 13:36:48 wyh ntpd[21449]: ntpd 4.2.4p8@1.1612-o Thu Jan 10 15:17:24 UTC 2013 (1)
   
2. May 10 13:36:48 wyh ntpd[21450]: precision = 0.291 usec
   
3. May 10 13:36:48 wyh ntpd[21450]: ntp_io: estimated max descriptors: 1024, initial socket boundary: 16
   
4. May 10 13:36:48 wyh ntpd[21450]: Listening on interface #0 wildcard, 0.0.0.0#123 Disabled
   
5. May 10 13:36:48 wyh ntpd[21450]: Listening on interface #1 wildcard, ::#123 Disabled
   
6. May 10 13:36:48 wyh ntpd[21450]: Listening on interface #2 lo, ::1#123 Enabled
   
7. May 10 13:36:48 wyh ntpd[21450]: Listening on interface #3 eth0, fe80::20c:29ff:fed3:9350#123 Enabled
   
8. May 10 13:36:48 wyh ntpd[21450]: Listening on interface #4 lo, 127.0.0.1#123 Enabled
   
9. May 10 13:36:48 wyh ntpd[21450]: Listening on interface #5 eth0, 192.168.174.141#123 Enabled
   
10. May 10 13:36:48 wyh ntpd[21450]: Listening on interface #6 virbr0, 192.168.122.1#123 Enabled
    
11. May 10 13:36:48 wyh ntpd[21450]: Listening on routing socket on fd #23 for interface updates
    
12. May 10 13:36:48 wyh ntpd[21450]: kernel time sync status 2040
    
13. May 10 13:36:48 wyh ntpd[21450]: frequency initialized 0.000 PPM from /var/lib/ntp/drift
    
14. May 10 13:36:50 wyh ntpd_initres[21452]: host name not found: 0.rhel.pool.ntp.org
    
15. May 10 13:36:50 wyh ntpd_initres[21452]: host name not found: 1.rhel.pool.ntp.org
    
16. May 10 13:36:50 wyh ntpd_initres[21452]: host name not found: 2.rhel.pool.ntp.org
    
17. May 10 13:36:55 wyh ntpd[21450]: ntpd exiting on signal 15
    
18. May 10 13:36:55 wyh ntpd_initres[21452]: parent died before we finished, exiting
    
19. May 10 13:40:01 wyh CROND[21513]: (root) CMD (/usr/lib/sa/sa1 1 1)

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我想问下楼主，Linux下使用哪种调试工具最好查看日志信息了。

liyaweihesmz

回复 13# wenhq


    能ping通。
    我配置了restrict 192.168.174.0 mask 255.255.255.0 nomodify notrap这条信息是允许192.168.174.153 这个机器的ntp配置同步吧。
    要是还需其他配置，我就不清楚了。

liyaweihesmz

1. # For more information about this file, see the man pages
   
2. # ntp.conf(5), ntp_acc(5), ntp_auth(5), ntp_clock(5), ntp_misc(5), ntp_mon(5).
   
3. 
   
4. driftfile /var/lib/ntp/drift
   
5. 
   
6. # Permit time synchronization with our time source, but do not
   
7. # permit the source to query or modify the service on this system.
   
8. restrict default kod nomodify notrap nopeer noquery
   
9. #restrict -6 default kod nomodify notrap nopeer noquery
   
10. 
    
11. # Permit all access over the loopback interface.  This could
    
12. # be tightened as well, but to do so would effect some of
    
13. # the administrative functions.
    
14. restrict 127.0.0.1
    
15. restrict -6 ::1
    
16. 
    
17. # Hosts on local network are less restricted.
    
18. restrict 192.168.174.0 mask 255.255.255.0 nomodify notrap
    
19. 
    
20. # Use public servers from the pool.ntp.org project.
    
21. # Please consider joining the pool (http://www.pool.ntp.org/join.html).
    
22. server 0.rhel.pool.ntp.org iburst
    
23. server 1.rhel.pool.ntp.org iburst
    
24. server 2.rhel.pool.ntp.org iburst
    
25. 
    
26. #broadcast 192.168.1.255 autokey        # broadcast server
    
27. #broadcastclient                        # broadcast client
    
28. #broadcast 224.0.1.1 autokey            # multicast server
    
29. #multicastclient 224.0.1.1              # multicast client
    
30. #manycastserver 239.255.254.254         # manycast server
    
31. #manycastclient 239.255.254.254 autokey # manycast client
    
32. 
    
33. # Undisciplined Local Clock. This is a fake driver intended for backup
    
34. # and when no outside source of synchronized time is available.
    
35. server 192.168.174.153
    
36. fudge   127.127.1.0 stratum 10
    
37. 
    
38. # Enable public key cryptography.
    
39. #crypto
    
40. 
    
41. includefile /etc/ntp/crypto/pw
    
42. 
    
43. # Key file containing the keys and key identifiers used when operating
    
44. # with symmetric key cryptography.
    
45. keys /etc/ntp/keys
    
46. # Specify the key identifiers which are trusted.
    
47. #trustedkey 4 8 42
    
48. 
    
49. # Specify the key identifier to use with the ntpdc utility.
    
50. #requestkey 8
    
51. 
    
52. # Specify the key identifier to use with the ntpq utility.
    
53. #controlkey 8
    
54. 
    
55. # Enable writing of statistics records.
    
56. #statistics clockstats cryptostats loopstats peerstats
    
57. 
    

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回复 17# wenhq


   

liyaweihesmz

回复 19# wenhq


    我在虚拟机上实验了，我在IP地址为192.168.174.153的主机上实验作为服务器，所以我就填这个地址啊。

liyaweihesmz

回复 21# wenhq


    还是同样的错误。
   ntpdate 192.168.174.153
   14 May 09:53:17 ntpdate[23062]: no server suitable for synchronization found

   NTP服务器中messages日志信息如下：

1. May 14 09:56:30 localhost ntpd[31468]: ntpd exiting on signal 15
   
2. May 14 09:56:30 localhost ntpd[31540]: ntpd 4.2.4p8@1.1612-o Thu Jan 10 15:17:24 UTC 2013 (1)
   
3. May 14 09:56:30 localhost ntpd[31541]: precision = 0.430 usec
   
4. May 14 09:56:30 localhost ntpd[31541]: Listening on interface #0 wildcard, 0.0.0.0#123 Disabled
   
5. May 14 09:56:30 localhost ntpd[31541]: Listening on interface #1 wildcard, ::#123 Disabled
   
6. May 14 09:56:30 localhost ntpd[31541]: Listening on interface #2 lo, ::1#123 Enabled
   
7. May 14 09:56:30 localhost ntpd[31541]: Listening on interface #3 eth0, fe80::20c:29ff:fe6f:4d56#123 Enabled
   
8. May 14 09:56:30 localhost ntpd[31541]: Listening on interface #4 lo, 127.0.0.1#123 Enabled
   
9. May 14 09:56:30 localhost ntpd[31541]: Listening on interface #5 eth0, 192.168.174.157#123 Enabled
   
10. May 14 09:56:30 localhost ntpd[31541]: Listening on interface #6 virbr0, 192.168.122.1#123 Enabled
    
11. May 14 09:56:30 localhost ntpd[31541]: Listening on routing socket on fd #23 for interface updates
    
12. May 14 09:56:30 localhost ntpd[31541]: kernel time sync status 2040
    
13. May 14 09:56:30 localhost ntpd[31541]: frequency initialized 23.467 PPM from /var/lib/ntp/drift
    

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