nanog mailing list archives
Re: Need trusted NTP Sources
From: Jay Ashworth <jra () baylink com>
Date: Sat, 8 Feb 2014 19:43:36 -0500 (EST)
----- Original Message -----
From: "Saku Ytti" <saku () ytti fi>
On (2014-02-06 21:14 -0500), Jay Ashworth wrote:My usual practice is to set up two in house servers, each of which talks to: And then point everyone in house to both of them, assuming they accept multiple server names.Two is worst possible amount of NTP servers to have. Either one fails and your timing is wrong, because you cannot vote false ticker. And chance of either of two failing is higher than one specific of them.
Fair point. In practice, it never bit me because nearly everything that wanted NTP would only accept one server name (being windows) and the things that *did* take more than one, I generally pointed to both internals, and something outside the firewall as well. In the architecture I described, though, is it really true that the odds of the common types of failure are higher than with only one? Cheers, -- jra -- Jay R. Ashworth Baylink jra () baylink com Designer The Things I Think RFC 2100 Ashworth & Associates http://www.bcp38.info 2000 Land Rover DII St Petersburg FL USA BCP38: Ask For It By Name! +1 727 647 1274
Current thread:
- Re: Need trusted NTP Sources, (continued)
- 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)
- Re: Need trusted NTP Sources Saku Ytti (Feb 09)
- Re: Need trusted NTP Sources Lyle Giese (Feb 09)
- Re: Need trusted NTP Sources Jimmy Hess (Feb 09)