NTP Sync Issue Across Tata (Europe)

Tue Aug 8 15:05:55 UTC 2023

It works fine, and is an industry standard. you have to mount the GPS antenna near a window with sky visibility, or on the roof. Many point-to-point microwave radios have GPS built in to obtain accurate timing for transmission multiplexing.

 -mel

On Aug 8, 2023, at 7:16 AM, Mike Hammett <nanog at ics-il.net> wrote:

"We use these exclusively in data centers"

How well does GPS work inside the datacenter?

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Mike Hammett
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________________________________
From: "Mel Beckman" <mel at beckman.org>
To: "Mark Tinka" <mark at tinka.africa>
Cc: nanog at nanog.org
Sent: Saturday, August 5, 2023 2:26:37 PM
Subject: Re: NTP Sync Issue Across Tata (Europe)

Mark,

You might consider setting up your own GPS-based NTP network. Commercial Ethernet GPS-sourced NTP servers, such as the Time Machines, TM1000A, are as little as $400. Or you can roll your own using a Raspberry Pi or similar nano computer with a GPS module and antenna. We use these exclusively in data centers now rather than depending on Internet NTP servers, primarily for security, because financial transactions in e-commerce can be sensitive to false time information. There are also a variety of NTP-based Internet attacks, so if you can block NTP at your border you’ve eliminated another attack surface.

-mel via cell

> On Aug 5, 2023, at 11:22 AM, Mark Tinka <mark at tinka.africa> wrote:
>
> 
>
>> On 8/5/23 20:17, Chris Adams wrote:
>>
>> It's the NTP pool people you need to talk to - the .freebsd. bit is just
>> a vendored entry into the pool (more for load tracking and management).
>
> Yes, Andreas clarified in unicast. Will do. Thanks.
>
> Mark.

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