Josh, Read deeper into the thread and you'll find where I sourced inexpensive RF-based NTP servers using CDMA, GSM, and even WWV. All radically different technologies that are unlikely to have common failure modes. But yes, buying different brands can't hurt either.
-mel beckman > On May 11, 2016, at 7:15 AM, Josh Reynolds <j...@kyneticwifi.com> wrote: > > I hope your receivers aren't all from a single source. > > I was in Iraq when this ( > http://dailycaller.com/2010/06/01/glitch-shows-how-much-us-military-relies-on-gps/ > ) happened, which meant I had no GPS guided indirect fire assets for 2 > weeks. > >> On Wed, May 11, 2016 at 8:31 AM, Leo Bicknell <bickn...@ufp.org> wrote: >> In a message written on Tue, May 10, 2016 at 08:23:04PM +0000, Mel Beckman >> wrote: >>> All because of misplaced trust in a tiny UDP packet that can worm its way >>> into your network from anywhere on the Internet. >>> >>> I say you’re crazy if you don’t run a GPS-based NTP server, especially >>> given that they cost as little as $300 for very solid gear. Heck, get two >>> or three! >> >> You're replacing one single point of failure with another. >> >> Personally, my network gets NTP from 14 stratum 1 sources right now. >> You, and the hacker, do not know which ones. You have to guess at least >> 8 to get me to move to your "hacked" time. Good luck. >> >> Redundancy is the solution, not a new single point of failure. GPS >> can be part of the redundancy, not a sole solution. >> >> -- >> Leo Bicknell - bickn...@ufp.org >> PGP keys at http://www.ufp.org/~bicknell/
