[Samba] NTP and FreeBSD jails

James B. Byrne byrnejb at harte-lyne.ca
Fri Jul 31 14:23:19 UTC 2020

On Thu, July 30, 2020 17:23, Robert Marcano wrote:
> On 7/30/20 5:00 PM, James B. Byrne via samba wrote:
>> FreeBSD-12.1p7
>> Samab-4.10.15 running in FreeBSD Jail
>> I just wish to ensure that my conclusion respecting Samba, FreeBSD Jails, and
>> NTP is correct.
>> 1.  Unless configured otherwise Windows domain clients will query and obtain
>> their time from the samba_server DC.
>> 2.  Samba_server obtains its time from the OS, in this case a FreeBSD Jail.
>> 3.  FreeBSD Jails get their time from their host.
>> 4.  If the host is running ntpd then this has the same effect as if ntpd was
>> running alongside the samba_server.
>> Is this reasoning correct?
> Yeah. I think it is OK, I run Samba DCs on Linux containers. I don't run
> the NTP server on the container, It is running on the host, but it is
> configured to read the Samba provided socket for signing the time (as
> Roland pointed to you to
> https://wiki.samba.org/index.php/Time_Synchronisation)
> Make sure that the host NTP server is bound to the same IP (in addition
> of any other you want) where you are exposing the Samba DC server
> container. For example if my host has IP address of and I
> expose the Samba DC container with then I have to make
> sure the NTP server is bound to and not only to the host IP.

Does this mean that samba_server issues ntp queries to UDP port 123 on its host
system?  Or does samba_server simply use the host's system clock time?

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James B. Byrne                mailto:ByrneJB at Harte-Lyne.ca
Harte & Lyne Limited          http://www.harte-lyne.ca
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