[ntp:questions] Very rapid polling

gary.limanapier at elisys.co.uk gary.limanapier at elisys.co.uk
Sat Feb 14 19:07:28 UTC 2009


On Feb 11, 11:52 pm, Unruh <unruh-s... at physics.ubc.ca> wrote:
> "Richard B. Gilbert" <rgilber... at comcast.net> writes:
>
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> >Unruh wrote:
> >> "Richard B. Gilbert" <rgilber... at comcast.net> writes:
>
> >>> Unruh wrote:
> >>>> "Richard B. Gilbert" <rgilber... at comcast.net> writes:
>
> >>>>> jlevine wrote:
> >>>>>> In the last few days I have seen an increasing number of systems that
> >>>>>> are requesting the time in NTP format several times per second. This
> >>>>>> poll interval is far in excess of the usual best practices. Since
> >>>>>> there are a number of such systems, it is possible that this problem
> >>>>>> is a result of a new version of NTP that has just been released.
> >>>>>> Please let me know if you have any information about a new version of
> >>>>>> NTP that can do this or if any of you are seeing the same problem.
>
> >>>>>> Thanks.
>
> >>>>>> Judah Levine
> >>>>>> Time and Frequency Division
> >>>>>> NIST Boulder
> >>>>> Have you captured the IP addresses of the systems involved?  If so, have
> >>>>> you identified the ISP responsible for those addresses?  Complained to
> >>>>> the ISP?  Etc, etc?
> >>>>> The half witted will always be with us. . . .
> >>>> There is no way you can set up ntpd so that it will poll many times a
> >>>> second, unless there is a severe bug in ntp. He is asking if perhaps such a
> >>>> bug exists in the latest version of ntpd ( since the latest version just
> >>>> came out a month ago, and latest devel version a week ago, this would be a
> >>>> sensible worry).
> >>>> Alternatively one of those modem manufacturers may have screwed up again,
> >>>> or some ntp  like program has come out that has such a default.
> >>>> I agree that asking the IP addressee what it is that they are running might
> >>>> work, but probably not.
>
> >>> It may take a while to get results but if the only alternative is to do
> >>> nothing and suffer. . . .  The ISPs have the power to cut these idiots
> >>> off at the knees!  Whether they are willing to do so is something you
> >>> have to ask them.  They also have the ability to reduce a network
> >>> address to a street address.  Again, you have to ask.  If you ask on
> >>> NIST letterhead, your chances of being taken seriously are much improved.
>
> >> IF it is a bug in ntp, then the users are not idiots, unless using ntp
> >> makes you an idiot. If it is a bug in some other ntp software, then the
> >> users of that software are not idiots, unless use of that software per se
> >> makes you an idiot. If it is some modem manufacturer who has misapplied ntp
> >> on their modem/router, again the same applies. He is trying to find out if
> >> it is possible that such bugs exist, or than anyone else has seen them


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