nanog mailing list archives
Re: Need trusted NTP Sources
From: Jared Mauch <jared () puck nether net>
Date: Fri, 7 Feb 2014 13:14:09 -0500
On Feb 7, 2014, at 10:56 AM, Matthew Huff <mhuff () ox com> wrote:
Working in the financial world, the best practices is to have 4 ntp servers (if not using PTP). 1) You need 3 to determine the correct time (and detect bad tickers) 2) If you lose 1 of the 3 above, then you no longer can determine the correct time 3) Therefore with 4, you have redundancy. We have two Symmetricom Stratum 1 time servers synced via GPS with Rubidium oscillators, and two RHEL 6 servers running ntpd for our 4 servers.
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.. 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. If you ask politely off-list, I will point you at where one of these is that you can talk to (in Dallas at the Infomart for your low-latency config). - Jared
Current thread:
- Re: Need trusted NTP Sources, (continued)
- Re: Need trusted NTP Sources Chris Adams (Feb 06)
- Message not available
- Re: Need trusted NTP Sources Notify Me (Feb 06)
- Re: Need trusted NTP Sources Aled Morris (Feb 06)
- 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)