[ntp:questions] NIST vs. pool.ntp.org ?

Rob nomail at example.com
Fri Mar 29 08:33:28 UTC 2013


Robert Scott <no-one at notreal.invalid> wrote:
> On Thu, 28 Mar 2013 21:21:55 GMT, Harlan Stenn <stenn at ntp.org> wrote:
>
>>On Thu, Mar 28, 2013 at 5:57 AM, Rob <nomail at example.com> wrote:
>>> so you will need to write an adaptive
>>> algorithm that recognizes what is happening here, and send the queries
>>> quickly enough (I would say at least two per second, maybe 4) to force
>>> the "active user" algorithm to kick in.
>>
>>Sending at a rate of more than 1 packet every 2 seconds or more than 8
>>packets per 64 seconds will trigger KOD responses.
>>
>
> Perhaps these "wake-up" packets could be some other UDP packet, like a
> Ping, and not to some time server, but to some other internet address,
> like www.microsoft.com (not really!).  If I understand Rob's
> suggestion, all that is needed is some kind of activity to wake up the
> radio/internet channel, not necessarily NTP activity.

That is right, you can just use ping to an address that you know responds
to pings (the NTP server might block pings), or you could fetch the
homepage of your website via TCP, whatever action that causes a quick
packet exchange of more than typically 4 packets will do it.



More information about the questions mailing list