[ntp:questions] Re: Questions and ruminations regarding NTPD 4 config and XP's bad behavior.
brad at stop.mail-abuse.org
Sat Jan 15 02:19:13 UTC 2005
At 8:45 PM -0500 2005-01-14, Richard B. Gilbert wrote:
> Usable stratum one servers can be very hard to find; there are a couple
> of hundred public stratum one servers but most of them will be so far
> away as to render them more or less useless!
I believe that most S1 servers will be closed to you, unless
you're running a suitably large network and you make explicit
arrangement with the respective S1 owner/operator(s), and all you're
doing is connecting a network of your own S2s to their S1s.
I think that's basically the kind of situation that exists here
(numbers-wise, that is), but you do have to do some work to go out
and find enough upstream time servers.
> One possible solution is to operate your own stratum one server; $300
> -- $500 US will buy a GPS timing receiver and antenna. If you can
> site the antenna where it will have an unobstructed view of the entire
> sky you have a solid source of time and a stratum one server of your
> very own.
Radio receivers are also a possibility. If you're in Western
Europe, you're probably close enough to Frankfurt to use a DCF. If
you're in Canada or Northern US, you should be able to use CHU.
Elsewhere in the US, you might be able to WWV, WWVB, or WWVH. There
are plenty of other radio stations around the world, depending on
where you are.
Or maybe a CDMA receiver. Heck, you could even do dial-up ACTS.
Brad Knowles, <brad at stop.mail-abuse.org>
"Those who would give up essential Liberty, to purchase a little
temporary Safety, deserve neither Liberty nor Safety."
-- Benjamin Franklin (1706-1790), reply of the Pennsylvania
Assembly to the Governor, November 11, 1755
SAGE member since 1995. See <http://www.sage.org/> for more info.
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