Re: NTP Sync Issue Across Tata (Europe)

[Mike Hammett <nanog () ics-il net>]

"We use these exclusively in data centers" 


How well does GPS work inside the datacenter? 




----- 
Mike Hammett 
Intelligent Computing Solutions 

Midwest Internet Exchange 

The Brothers WISP 

----- Original Message -----

From: "Mel Beckman" <mel () beckman org> 
To: "Mark Tinka" <mark@tinka.africa> 
Cc: nanog () 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@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.