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jasy
Asked: 2011-04-16 03:24:25 +0800 CST

ntpdate: no server suitable for synchronization found

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[root@myHost default]# ntpdate -d pool.ntp.org
15 Apr 11:21:18 ntpdate[6331]: ntpdate [email protected] Thu Feb 24 20:39:57 EST 2011 (1)
Looking for host pool.ntp.org and service ntp
host found : magma.woody.ch
transmit(157.161.57.1)
transmit(157.161.57.1)
t    ransmit(157.161.57.1)
transmit(157.161.57.1)
transmit(157.161.57.1)
157.161.57.1: Server dropped: no data
server 157.161.57.1, port 123
stratum 0, precision 0, leap 00, trust 000
refid [157.161.57.1], delay 0.00000, dispersion 64.00000
transmitted 4, in filter 4
reference time:    00000000.00000000  Thu, Feb  7 2036  6:28:16.000
originate timestamp: 00000000.00000000  Thu, Feb  7 2036  6:28:16.000
transmit timestamp:  d152a8b1.9ca2ec28  Fri, Apr 15 2011 11:21:21.611
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 Apr 11:21:22 ntpdate[6331]: no server suitable for synchronization found

can someone please help me to understand what above means?

centos timezone ntpdate

2 Answers

  1. The only server ntpdate found for update had a problem returning the date for your server. That can be some things:

    • If it was only this time, on this server, it could be a temporary issue and you should try again (since you are using pool.ntp.org and that points to various different servers);
    • If it happens with all the ntp servers you try, you can be behind a firewall that blocks ntp traffic or
    • You can have a bug or a config issue.
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  2. It means the server you are getting connected to either was not giving out the time (I just check it, it is working fine at this moment) or your network doesn't let you talk to it on the right ports. Maybe you are behind an overly restrictive firewall?

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