nanog mailing list archives
Re: NTP Sync Issue Across Tata (Europe)
From: Masataka Ohta <mohta () necom830 hpcl titech ac jp>
Date: Mon, 14 Aug 2023 23:58:42 +0900
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
Current thread:
- Re: NTP Sync Issue Across Tata (Europe), (continued)
- Re: NTP Sync Issue Across Tata (Europe) Masataka Ohta (Aug 09)
- Re: NTP Sync Issue Across Tata (Europe) Jay R. Ashworth (Aug 13)
- Re: NTP Sync Issue Across Tata (Europe) Rubens Kuhl (Aug 05)
- Re: NTP Sync Issue Across Tata (Europe) Giovane C. M. Moura via NANOG (Aug 07)
- Re: NTP Sync Issue Across Tata (Europe) Mark Tinka (Aug 07)
- Re: NTP Sync Issue Across Tata (Europe) Giovane C. M. Moura via NANOG (Aug 07)
- Re: NTP Sync Issue Across Tata (Europe) Mark Tinka (Aug 07)
- Re: NTP Sync Issue Across Tata (Europe) Mel Beckman (Aug 06)
- Fwd: NTP Sync Issue Across Tata (Europe) Mel Beckman (Aug 06)
- Re: NTP Sync Issue Across Tata (Europe) goemon--- via NANOG (Aug 14)
- Re: NTP Sync Issue Across Tata (Europe) Forrest Christian (List Account) (Aug 14)
- Re: NTP Sync Issue Across Tata (Europe) Masataka Ohta (Aug 14)
- Re: NTP Sync Issue Across Tata (Europe) Forrest Christian (List Account) (Aug 14)