5 ms·
> It would be great to see Google or Cloudflare use their infrastructure to provide anycasted NTP IP addresses. Google, Cloudflare and Facebook has vanity IPv6
by miyuru 4y ago
> It would be great to see Google or Cloudflare use their infrastructure to provide anycasted NTP IP addresses.
Google, Cloudflare and Facebook has vanity IPv6 address, pretty sure they are all static anycast IPs.
time.google.com - 2001:4860:4806::
time.cloudflare.com - 2606:4700:f1::123
time.facebook.com - 2a03:2880:ff0c::123
- WirelessGigabit 4y agoMind you that Google smeared the leap second. Not sure if the others do, but I think is important to recognize when selecting an NTP.
- zokier 4y agoAs long as they do not start smearing leap days I don't think it matters much for bootstrapping. You only need time accurate enough for validating certs, after that you can use whatever pool you want.
- plantain 4y agoSmearing is probably what most people actually want...
- oittaa 4y agoYeah, this comes up every now and then in these discussions. Both Amazon and Google have explained quite well why smearing is probably the best way to handle leap seconds.
- mike_d 4y agoI also run a pair of worldwide anycasted NTP instances if you don't want to deal with smearing or depending on the same company for DNS and time. 45.127.112.2 45.127.113.2
- cyounkins 4y agoCool! I searched but couldn't find any docs - looks like it might have been for ntpjs? What was the process like to get an ASN to do this?
- jedisct1 4y agoAs for IPv4, time.google.com has been 216.239.35.0 since 2016, so it's unlikely to change anytime soon either.
- bobdvb 4y agoOne of the problems with Anycast is that you can get inconsistencies in the responses because you're potentially hitting multiple servers with different RTTs. So you'd want to ensure they're a higher Stratum number than your final, accurate servers.