[ntp:questions] Re: unreachable servers
Richard B. Gilbert
rgilbert88 at comcast.net
Fri May 27 16:02:32 UTC 2005
Adamiec, Larry wrote:
>I am running a stratum 3 server on Solaris 9. My config file contains
>the following entries:
>
>server ntp-1.cso.uiuc.edu
>server gilbreth.ecn.purdue.edu
>server ntp1.kansas.net
>server blade.avnf.com
>
>When I run the ntpq command, I receive the following results:
>
>ntpq> associations
>ind assID status conf reach auth condition last_event cnt
>===========================================================
> 1 43644 9614 yes yes none sys.peer reachable 1
> 2 43645 8000 yes no
> 3 43646 8000 yes no
> 4 43647 9414 yes yes none synchr. reachable 1
>
>ntpq> peers
> remote refid st t when poll reach delay offset
>disp
>========================================================================
>======
>*ntp-1.gw.uiuc.e truechimer.cso. 2 u 202 1024 377 7.64 -0.035
>0.43
> gilbreth.ecn.pu 0.0.0.0 16 - - 1024 0 0.00 0.000
>16000.0
> triangle.kansas 0.0.0.0 16 - - 1024 0 0.00 0.000
>16000.0
>+blade.avnf.com hora.cs.tu-berl 2 u 462 1024 377 29.85 -9.631
>20.16
>
>Why would these servers be unreachable? A ping from server shows them
>to be alive and working.
>
>Thanks for any help.
>
>Larry
>
>
Does your config file contain any restrict statements?
It's possible that a firewall is blocking port 123 somewhere along the
line. AFAIK there is no good reason to do so, but some networking
people start by blocking everything and allowing only what they think
they need..
It's also possible that the server is refusing connections from you for
some reason. Contact the administrator and inquire about the problem
AFTER you have done all possible to make sure the problem is not on your
end.
FWIW both gilbreth.ecn.purdue.edu and ntp1.kansas.net are reachable from
my site. I used ntpdate -du which simply queries the server and reports
what it would do if I permitted it to adjust my clock. Both servers
responded promptly with times in good agreement with the servers I use
regularly. It seems likely, therefore, that the problem IS at your end.
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