David,
There are copious examples of that happening right now on the NIST and
USNO servers. What would you suggest we do to stop it? See the paper
Mills, D.L., J. Levine, R. Schmidt and D. Plonka. Coping with overload
on the Network Time Protocol public servers. Proc. Precision Time and
Time Interval (PTTI) Applications and Planning Meeting (Washington DC,
December 2004), 5-16.
Full text is at www.eecis.udel.edu/~mills/papers.html.
Dave
David J Taylor wrote:
[Excuse top-post]
.. and so if the client ignores the KoD, it may keep hammering on the
server every second?
David
David L. Mills wrote:
David,
Current ntpd will clamp the poll interval to not less than 4 in server
replies no matter what the client says. If KoD is enabled, it will
return KoD packets if the headway beteen packets is less than 1 s or
the average headway is less than 4 s.
Dave
David J Taylor wrote:
On a related topic, what does NTP do if a request is received with
the Poll field set to less than the minimum value (4)? Is the
request silently dropped? Or a KOD packet sent?
David
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