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Re: [Samba] nameservers, all DCS??




thanks to all, i add the name servers and one ptr missing and replicate
works without problems,

regards,
Carlos

2018-05-25 7:20 GMT-03:00 L.P.H. van Belle via samba <samba@xxxxxxxxxxxxxxx>
:

> I dont understand whats the question here.
>
> But what i can say about the resolv.conf settings if you have multiple
> dc's.
>
> You have to think in 2 DNS resolving settings.
>
> 1) on the server as client resolving ( resolv.conf )
> 2) clients resolving ( DNS Services )
>
> The difference explained.
> If i do : ping hostname   this is a server which is doing a client dns
> request through resolve.conf
> If i do : dig A hostname @DNSSERVER  this is a server which is doing a
> client resolving request through dns services. ( port 53 )
>
> In case of 2 DCs.
> Before the join of second DC, point the resolv.conf to DC1.
> After the join of the second DC, and after the reboot of the server, this
> changes a bit.
> Change resolve.conf to
> Nameserver IP_OF_DC2   ( NOT LOCALHOST ) !
> Nameserver IP_OF_DC1
> (optional add a internet DNS server, if both DC's fail you server can
> still use the internet )
>
> DC1 should now  have
> Nameserver IP_OF_DC1   ( NOT LOCALHOST ) !
> Nameserver IP_OF_DC2
> (optional add a internet DNS server, if both DC's fail you server can
> still use the internet )
>
>
> A 3 DC setup.
> Same as the 2 DC setup, but add the third to it.
>
> A 4+ DC setup.
> Here i preffer the following, the DC with FSMO roles in this example is
> DC1.
> DC1 resolv.conf DC1 first, then what you want.
> DC2 resolv.conf
>         DC2
>         DC3
>         DC4
>
> DC3     resolv.conf
>         DC3
>         DC4
>         DC2
>
> DC4     resolv.conf
>         DC4
>         DC2
>         DC3
>
> Etc etc
>
> And i advice this also in resolv.conf if you run multiple dc.s
> # resolv.conf its timeout is 5 sec by default, to long imo.
> options timeout:2
> # round-robin selection of name servers from among those listed
> rotate
>
> Why no localhost in the resolv.conf, that can give problem with kerberos
> things.
> Localhost =! Hostname
>
>
> Greetz,
>
> Louis
>
>
>
> > -----Oorspronkelijk bericht-----
> > Van: samba [mailto:samba-bounces@xxxxxxxxxxxxxxx] Namens
> > Denis Cardon via samba
> > Verzonden: vrijdag 25 mei 2018 11:59
> > Aan: Carlos; samba@xxxxxxxxxxxxxxx
> > Onderwerp: Re: [Samba] nameservers, all DCS??
> >
> > Hi Carlos,
> >
> > > About order Dcs in resolv.conf
> > >
> > > DC(LOCAL)
> > > DC(OTHER)
> >
> > that is what we do here. You'll find some articles about DNS
> > islanding
> > (for example [1]) that would recommend to do differently, but if you
> > happen to have the issue mentionned in those articles, you
> > can actually
> > fix it by hand easily.
> >
> > > I send same question in April:
> > >
> > > https://lists.samba.org/archive/samba/2018-April/214957.html
> >
> > unfortunately there is no one paid on this list to answer your
> > questions... If no one is inspired or have time or have will
> > or have the
> > knowledge, then there may be no answers (which is actually
> > not so common
> > on this list).
> >
> > Cheers,
> >
> > Denis
> >
> > [1]
> > https://support.microsoft.com/en-us/help/275278/dns-server-bec
> > omes-an-island-when-a-domain-controller-points-to-itself
> >
> > > About Replication, is KCC....
> > >
> > > I send question im May
> > >
> > > https://lists.samba.org/archive/samba/2018-May/215636.html
> >
> >
> > >
> > >
> > > Regards;
> > >
> > >
> > >
> > > On 24-05-2018 18:43, Carlos Bordon via samba wrote:
> > >> hi!
> > >>
> > >>
> > >> Query, I have 3 DCs, in each of the servers should have
> > configured the
> > >> other two DCs in the resolv.conf?
> > >>
> > >> or with only the primary is enough?
> > >>
> > >> Maybe that's my problem that does not replicate the dc3
> > with the dc2
> > >>
> > >> thanks to all!
> > >
> > >
> >
> > --
> > Denis Cardon
> > Tranquil IT Systems
> > Les Espaces Jules Verne, bâtiment A
> > 12 avenue Jules Verne
> > 44230 Saint Sébastien sur Loire
> > tel : +33 (0) 2.40.97.57.55
> > http://www.tranquil.it
> >
> > Samba install wiki for Frenchies : https://dev.tranquil.it
> > WAPT, software deployment made easy : https://wapt.fr
> >
> > --
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> >
> >
>
>
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