[169004] in North American Network Operators' Group
Re: Need trusted NTP Sources
daemon@ATHENA.MIT.EDU (Majdi S. Abbas)
Sat Feb 8 15:54:08 2014
Date: Sat, 8 Feb 2014 15:53:49 -0500
From: "Majdi S. Abbas" <msa@latt.net>
To: NANOG <nanog@nanog.org>
In-Reply-To: <4BF35C9F-4207-4A12-8FA4-1C3721057CEA@puck.nether.net>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Fri, Feb 07, 2014 at 01:14:09PM -0500, Jared Mauch wrote:
> If you want something that is "cheap" as in you for your home, I can
> recommend this: ~$350 w/ antenna, etc..
>
> http://www.netburnerstore.com/product_p/pk70ex-ntp.htm
>
> You can get the whole thing going quickly. Majdi has also had good luck
> with this unit (perhaps he wants to chime-in, heh pun unintended) regarding
> a few other devices.
The Netburner NTP sample app works well enough for basic home
use, although I get better timing performance out of a fleet of hand
modified Soekrii.
I've been modifying NET4801s to include internal Motorola Oncore
timing receivers (this is a tight fit, but doable, in the factory
cases), or to break out their second serial port for connections to
external reference clocks. (I have one connected to a TrueTime TL-3 to
use WWV as a backup to GPS, but it can also be a travelling GPS NTP
server with, say, a Garmin GPS18lvc connected.)
You can make your own sub-$150 NTP server -- I'll spare the
list the details, but those that are interested should see:
http://puck.nether.net/~majdi/ntp/
Feedback is appreciated -- I've only spent about an hour on
this doc, and it assumes a lot of familiarity with FreeBSD. I will
try to flesh it out more as I have time.
Cheers,
--msa
