[time-nuts] Cloudflare

[Bob kb8tq]

Hi

Sorry for the double post !!!!

Actually there *is* another answer: 

Run an atomic clock. 

That sounds exotic and really expensive. In fact they are a sub $1,000 sort 
of item in bulk (like hundreds). A Rubidium based device will hold “rate”
to under a nanosecond per second pretty much forever and ever. With a bit
of minor work, that will come down by a factor of 10 or more. 

It’s not “time of day” but it is a clock you can depend on. If somebody does
get in and start yanking time by seconds, it’s going to tell you what’s happening. 
Yes indeed it’s a belt for your suspenders and your other belt. That seems to be
one of the ways one makes a hardened system.

(This thought occurred as I got up for more coffee and had to step around the 
atomic clock that is sitting on the floor …. :) )

Bob

> On Jun 21, 2019, at 10:01 PM, Sanjeev Gupta <ghane0 at gmail.com> wrote:
> 
> Bob,
> 
> The hardware is cheap.  The software is free.  The skills to deploy are
> widely available.  But...
> 
> A cable run from your rack in the middle of the datacenter, through to the
> roof, is either impossible or thousands of dollars and weeks of planning.
> 
> Data centers can run wires within the building for exorbitant costs, asking
> them to run one to the exterior is, well, impossible.
> 
> -- 
> Sanjeev Gupta
> +65 98551208     http://www.linkedin.com/in/ghane
> 
> 
> On Sat, Jun 22, 2019 at 6:06 AM Bob kb8tq <kb8tq at n1k.org> wrote:
> 
>> Hi
>> 
>> Given the relatively low cost of a GPS based “Stratum 1” NTP, it’s not
>> real clear
>> why (at the end of the paper) they go off and “exchange emails
>> individually with the
>> organizations that run stratum 1 servers, as well as negotiate permission
>> to use them.”
>> to source the root time for the system. I would have thought that some
>> sort of combo
>> of on site and off site sources would be at the “top of the tree”.
>> 
>> Bob
>> 
>>> On Jun 21, 2019, at 2:20 PM, Marco Davids via time-nuts <
>> time-nuts at lists.febo.com> wrote:
>>> 
>>> Opinions, anyone?
>>> 
>>> https://blog.cloudflare.com/secure-time/amp/
>>> 
>>> ("Introducing time.cloudflare.com")
>>> 
>>> --
>>> Marco
>>> 
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