Forrest Christian (List Account) wrote:
There are lots of ways to improve a GPS-based NTP server. Better antenna
positioning. Better GPS chipset. Paying attention to antenna patterns.
Adding notch filters to the GPS feed. And so on.
They are not a very meaningful improvement.
But, in the end, there is nothing better than adding a second
GPS source at a diverse location as far as improving reliability, provided
that's an option based on timing needs.
You keep ignoring DOS attacks.
Though you wrote:
: If I just want to deny you time, it gets cheaper and
: easier. All I need is a 1.2 GHz oscillator coupled to an
: antenna. There are units like this available for under $10,
: delivered. These block GPS trackers on trucks and/or private
: automobiles. Build your own and you can get a watt or two
: to shove into a tiny antenna for not a lot more. Guaranteed
: to Jam anything within a couple of blocks.
you don't understand similar effectiveness by DOS.
I can also attest that there is at least one overlap between time-nuts and
NANOG....
See above.
Masataka Ohta
