[withinboredom]

I have 3 servers, 2/3 don't have hardware timestamping on the interface, 1 does. Makes a huge difference when it comes to NTP.

[csdvrx]

Which hetzner server have hardware timestamping on the interface?

I'd be really interested to know, since to the best of my knowledge, they don't have PTP solutions in their datacenter.

[withinboredom]

I have two of the AX41-NVMe, and only one was lucky enough to get a "Intel Corporation I210 Gigabit Network Connection (rev 03)" which has the hardware timestamping.

In the finland datacenter, it appears there is a PTP running, though the offset is ~2.33 seconds off from NTP. Chrony says its a false-ticker, but I haven't really figured out how to get it configured correctly nor have I asked Hetzner for help. I've mostly just played around with it.

I did manage to also accidentally discover a local ISP's stratum 1's server is extremely close to me, as in a few microseconds away (I accidentally put hetzner's servers as a pool instead of a server and my NTP 'discovered' the stratum 1) ... I'm not using it, but I've thought about reaching out to them to ask if I can use it if I'm very nice.

[csdvrx]

Would you care to share the IPs? (both for the Hetzner PTP one and the local ISP stratum 1)

Is the 2.33s stable? If so, after deducing the stable offset, it could still be valuable.

[withinboredom]

`/dev/ptp0` and `/dev/pps0` magically showed up and yeah, it appears to be stable. Chrony actually has it marked as a non-false ticker atm and is marked as a backup. Here's the stats:

  Name/IP Address            NP  NR  Span  Frequency  Freq Skew  Offset  Std Dev
  ==============================================================================
  PPS                        64  40   67m     -6.827     33.059    -72ms    99ms
  PTP                         6   3    20     -9.585      0.005   -119ms    10ns
  192.168.100.1               6   3   88h     -0.159      0.000    -12ms  3815ns
  192.168.100.2               6   3   29h     -0.176      0.299    -11ms  2817us
  ntp1.hetzner.de            14  10  154m     -0.003      0.006    -47us    12us
  ntp2.hetzner.de            11   6  103m     -0.001      0.005    -21us  5711ns
  ntp3.hetzner.de             9   6  137m     -0.006      0.007    -72us  8949ns

I don't feel great about sharing the discovered stratum 1's on the open internet, but my email address is in my profile.