"Richard B. Gilbert" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > David J Taylor wrote: >> Hal Murray wrote: >> >>>In article <[EMAIL PROTECTED]>, >>>"Alexandre Carrausse" <[EMAIL PROTECTED]> writes: >>> >>>>Thanks, the GPS would be an option, but in the very secure site I am >>>>working in, I am afraid I will not even be allowed to install an >>>>antenna. >> >> [] >> >>>>What is the approx cost of such systems? >>> >>>Do-it-yourself: Under $100 for a Garmin GPS 18 LVC. You also need >>>a PC. Old ones are probably OK. >> >> >> For example .. >> >> http://www.david-taylor.myby.co.uk/ntp/FreeBSD-GPS-PPS.htm >> >> .. including an antenna just poking out of the window. Of course, you >> probably can't open the windows either! >> >> David > > If his site is really secure, he may have Windows but probably doesn't > have windows!!! His electronic equipment may have to meet the "Tempest" > criteria; e.g. any electromagnetic energy emissions do not contain > recoverable information. Add inner and outer chain link fences topped > with barbed wire, armed guards, and dogs. Your imagination can't be to > vivid!!!! ;-)
It is not fort knox but almost ;-) No windows and no telecommunication devices are allowed in the computer room, no gsm, no antenna, no copper. Thank your for your help. Today I have tested some monitoring tools, and overall the situation is good. Our system is 9 minutes below the real time (my wristwatch:-) Here is how looks our client tcp.conf file file : server serverA As suggested, I am thinking about improving it to have server serverA server serverB server serverC server serverD server serverE On serverA, I am thinking about having the following conf peer serverB peer serverC peer serverD peer serverE and so on for BCDE. Does this make sense? Alex _______________________________________________ questions mailing list [email protected] https://lists.ntp.isc.org/mailman/listinfo/questions
