Mike Leber(mleber@he.net)@2002.08.26 23:52:08 +0000:
I was wondering if anybody has any suggestions for a low priced, off the shelf, complete (includes any necessary receivers), standalone (as in you just plug it in and connect ethernet), stratum 1 NTP server?
some years ago, i migrated all of my server infrastructure from NTP to clockspeed and the taiclock protocol, which works a bit different to NTP. every server keeps its own correction/drift values in a running software PLL. my current update interval is to poll the main server(s) every two weeks. after experiencing several problems with xntpd (like folks sending random udp packets with spoofed ip addresses causing several machines to drift up to two(!) hours (yes, the default configurations are without any auth on most OS distributions), the problem was solved by not depending on a steady feed of fresh clock information. adjustment bases solely on a single correction value, which runs in a tolerance window of about 25 to 30 attoseconds per week on most intel based boards i got here. http://cr.yp.to/clockspeed.html i know that some folks will start to bash on dan, again, but his approach to tackle the time synchronization problem appeared to solve most/all of our operational problems of our time servers and clients. in daily operations, clockspeed/taiclock clearly proved to be superior to NTP, timed, et al. furthermore, the software is very simple to install and maintain, with less security/stability risks due to less complexity in code. regards, /k --
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