[ntp:questions] ntp pool servers disappear - more data
David Woolley
david at ex.djwhome.demon.invalid
Sat Jun 26 09:39:15 UTC 2021
On 26/06/2021 00:12, William Unruh wrote:
> Not at all sure what you are suggesting. DNS is a way of translating
> names to IP addresses, which your machine MUST use to talk to a remote
As already noted, there is no MUST about it. I'd put it as low as MAY,
and it is definitely no more than SHOULD.
> machine not on your network. The remote machine has nothing to do with
DNS can be used for local network machines, as well, and this is very
common.
> this. Now some remote machines will as for the name associated with the
> IP address of machines sending the remote machine a query, to try to see
> if someone is spoofing the IP address, but as far as I know ntpd does
> not do that. Takes too much time and would make the time responses
> really bad.
ntpd doesn't care about who is sending it a query, and, in any case
reverse DNS lookups often provide bad results, which won't match the
preferred forward lookup, in the real world.
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