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3

You seem to miss a whole about how NTPD is working. First, NTPD will refuse to change time if the machine clock is off for more then configured panic value (defaults to 1000 seconds). Second, NTPD doesn't only "change" time. It can use a mix of methods to change how the time is counted inside the machine clock making time flow slower or faster. If you ...


4

ntp will not change the clock if the time is "too wrong", which might be why you have the problem. However the simplest way to debug this is to add this to ntp.conf: logfile /var/log/ntpd.log If you run the ntpdate command and receive an error like so: # ntpdate ntp.ubuntu.com ntpdate[26284]: Can't adjust the time of day: Operation not permitted ...


0

Turns out the answer is... nothing really at all to do with the group policy or time setting specificilaly. It's the classic "user connected two ends of the same network cable to a switch" shenanigans, causing repeating ARP packets. I noticed when I started powering machines down and an office with zero powered-on machines had 3 active lights on a switch - ...


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I have a "high stratum" local network time source that give me a falsetick status (x) in ntpq too, and I found that using "server [IP-addr] true" in ntp.conf will bypass the falsetick checking, and allowing it to be a possible candidate. Looks like the stratum number does not always means higher priority.


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On your "isolated" server, isolated.corpaddress.tdl, use w32tm /query /peers to verify that it is using the NTP source that you want it to use: PS C:\Users\Administrator> w32tm /query /peers #Peers: 2 Peer: 0.us.pool.ntp.org State: Active Time Remaining: 1023.4062481s Mode: 3 (Client) Stratum: 2 (secondary reference - syncd by (S)NTP) PeerPoll Interval: ...


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Example config: shipping-2960# show run | i ntp ntp server 207.182.243.123 ntp server 69.65.40.29 prefer ntp server 208.53.158.34 To check status: shipping-2960# show ntp status Clock is synchronized, stratum 3, reference is 207.182.243.123 nominal freq is 190.7348 Hz, actual freq is 190.7286 Hz, precision is 2**18 reference time is D75F39BB.6F04B482 ...



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