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> I suspect the NTP server had a badly faulty internal clock which ran very fast.

A time server with a defective clock seems to be a serious problem. Zimmie says the time server was an appliance; so someone is selling as an appliance a time server that can't tell the time.

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Not only could it not tell the time, but also had catastrophic bugs in time handling and does not handle y2k38. If that was on my network, the vendor would get yeeted immediately.

I was quite aware that our (different company) time server was based on getting CDMA signal, and - oh, wait - CDMA was retired last year? Luckily, we could open our internet firewall to let it talk to external stratum 1 servers and configure it to be stratum 2, rather than the stratum 1 we bought. Replacements using GPS are in process, but are impeded by weak GPS signal in the data centers. Antennas are to be implemented...

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