NTP through DNS?

Mauricio Tavares raubvogel at gmail.com
Wed Sep 19 14:59:28 UTC 2018

On Wed, Sep 19, 2018 at 10:12 AM, Andrew Latham <lathama at gmail.com> wrote:
> You can add SRV records for NTP to your domain if that is what you are
> asking.
      Thanks. I was trying to query for it using dig and then realized
I did not know if that is doable.

On Wed, Sep 19, 2018 at 10:16 AM, Mukund Sivaraman <muks at mukund.org> wrote:
> On Wed, Sep 19, 2018 at 10:08:34AM -0400, Mauricio Tavares wrote:
>> Stupid question: can I publish/query the NTP server through DNS the
>> same way I can ask who is doing LDAP?
> An NTP serice doesn't belong to a domain, so maybe not (I don't know of
> one off my mind).
      Not necessarily; I can name a few universities and business who
offer their own NTP servers to their internal systems. AFAIK, this is
considered good practice.

> For provisioning, there are DHCP options to do this. E.g., with ISC-DHCP
> and as the NTP server:
> subnet netmask {
>        ...
>        option ntp-servers;
> }
> and perhaps also use "tcode" and "time-offset" options to set the
> timezone.
> But a real bummer is that some DHCP clients (e.g., Android phones) do
> not make use of this option, and don't even provide a config setting to
> do so. IIRC they synchronize time via the cell phone signal.
      Add Windows devices to the list.

>                 Mukund

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