NTP服务

liyaweihesmz

    RHEL6.3上NTP服务如何配置？？？

liyaweihesmz

回复 25# sirense


    不可以。

sirense

NTP服务器能不能连到 自身/etc/ntp.conf 里 server 行配置的服务器IP？

wenhq

ntpdate -d yourlocalntpserver

ntptrace yourlocalntpserver


and tcpdump -i eth0 and udp and port 123 抓包看下。

wenhq

回复 10# liyaweihesmz
是UDP 123 不是TCP 你设置的没问题？

   

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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wenhq

回复 20# liyaweihesmz


    恩，注释掉那3行，重启一下ntp 服务试试。

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。

wenhq

server 192.168.174.153 ##改成你本地的ntpserver IP
这个IP 是你内网的 ntp server 192.168.174.153？
#############################
server 0.rhel.pool.ntp.org iburst

server 1.rhel.pool.ntp.org iburst

server 2.rhel.pool.ntp.org iburst

注释掉这3行。

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