nanog mailing list archives
Re: Need trusted NTP Sources
From: Bryan Seitz <seitz () bsd-unix net>
Date: Fri, 7 Feb 2014 23:35:25 -0500
On Fri, Feb 07, 2014 at 03:32:22PM -0500, Anthony Williams wrote:
With a quick and easy mod, another option for $35 is a Sure Electronics GPS board. GPS: http://www.sureelectronics.net/goods.php?id=99 Mod: http://www.satsignal.eu/ntp/Sure-GPS.htm -Alby On 2/7/2014 1:14 PM, Jared Mauch wrote:Having a number of NTP servers will help you detect false tickers which may be critical. If you want something that is "cheap" as in you for your home, I can recommend this: ~$350 w/ antenna, etc..
The SureGPS is decent fun but i've had this device lose sync / crap out randomly as well. I am using the Garmin 18X-LVC + a low power server with pretty good success. (Requires PPS soldering + USB pigtail for power, pretty easy mod) [seitz@ntp-gps ~]$ ntpq -p remote refid st t when poll reach delay offset jitter ============================================================================== clock.fmt.he.ne .CDMA. 1 u 53 64 377 76.692 0.976 0.291 time-a.timefreq .ACTS. 1 u 39 64 377 48.140 -0.896 0.348 time-b.timefreq .ACTS. 1 u 56 64 377 48.800 -0.986 0.430 time-b.nist.gov .ACTS. 1 u 48 64 377 7.333 3.630 0.562 oGPS_NMEA(1) .PPS. 0 l 4 16 377 0.000 0.002 0.000 * GPS is on a http://us.shuttle.com/barebone/Models/XS36VL.html - chosen for the dual external serial ports. -- Bryan G. Seitz
Current thread:
- Re: Need trusted NTP Sources, (continued)
- Re: Need trusted NTP Sources Mark Milhollan (Feb 06)
- Re: Need trusted NTP Sources Jay Ashworth (Feb 06)
- Re: Need trusted NTP Sources Saku Ytti (Feb 07)
- Re: Need trusted NTP Sources Jimmy Hess (Feb 07)
- Re: Need trusted NTP Sources Jay Ashworth (Feb 08)
- Re: Need trusted NTP Sources Roy (Feb 07)
- RE: Need trusted NTP Sources Matthew Huff (Feb 07)
- Re: Need trusted NTP Sources Jared Mauch (Feb 07)
- Re: Need trusted NTP Sources Anthony Williams (Feb 07)
- You need a VLAN to the foot of NIST ITS services - no problem - we got you covered. Re: Need trusted NTP Sources TGLASSEY (Feb 07)
- Re: Need trusted NTP Sources Bryan Seitz (Feb 07)
- Re: Need trusted NTP Sources Majdi S. Abbas (Feb 08)
- Re: Need trusted NTP Sources Jay Ashworth (Feb 08)
- Re: Need trusted NTP Sources Jay Ashworth (Feb 08)
- Re: Need trusted NTP Sources Saku Ytti (Feb 09)
- Re: Need trusted NTP Sources Andriy Bilous (Feb 09)
- Re: Need trusted NTP Sources Saku Ytti (Feb 09)
- Re: Need trusted NTP Sources Andriy Bilous (Feb 09)
- Re: Need trusted NTP Sources Jay Ashworth (Feb 09)
- Re: Need trusted NTP Sources Saku Ytti (Feb 09)
- Re: Need trusted NTP Sources Jay Ashworth (Feb 09)