[Samba] small dns question

mourik jan heupink - merit heupink at merit.unu.edu
Sun Mar 30 02:16:00 MDT 2014

Hi Stuard,

I'm replying to the list so others can reply to the last bit of your 

About the samba forwarders:
What I did, was configure DIFFERENT forwarders on dc1 and dc2. This 
gives redundancy if one of your forwarders goes down.

About your rfc2307 questions / remarks: I have no idea, perhaps someone 
else can answer those.


On 03/29/2014 10:28 PM, Stuart Naylor wrote:
> RE: [Samba] small dns question
> Works for me if I add a forwarder.
> PDC Samba1
> /etc/samba/smb.conf
> # Global parameters
> [global]
>          workgroup = SAMBA4
>          realm = SAMBA4.LAN
>          netbios name = SAMBA1
>          server role = active directory domain controller
>          dns forwarder =
>          idmap_ldb:use rfc2307 = yes
> ADC Samba2
> /etc/samba/smb.conf
> # Global parameters
> [global]
>          workgroup = SAMBA4
>          realm = samba4.lan
>          netbios name = SAMBA2
>          server role = active directory domain controller
> When you add an ADC the auto created smb.conf isn't the same.
> I can understand the shares not being there and using Samba2 as my dns would fail on external DNS.
> So I pasted thedns forwarder = and smbcontrol all reload-config I was in business on the second dns
> So yes but really would love the internal DNS to be able to have more than a singular forwarder. Not a fan of bind especially just for the use of a DC.
> I have a question and that is withrfc2307 as should that be copied as well?idmap_ldb:use rfc2307 = yes
> Things will work but say with a samba4 fsmo transfer then I guess not.
> I have been using https://wiki.samba.org/index.php/Samba4/HOWTO/Join_a_domain_as_a_DC
> And in typical M$ style after a reboot host -t A dc2.samdom.example.com.
>   * Before you start samba, you should check, if the new DCs DNS
>     entries are set correctly during joining. This doesn't currently
>     work 100% and have to be done manually in that case.
>   * From the new host, try to resolve its hostname: 
> # host -t A dc2.samdom.example.com.
> Can anyone help with this as it fails
> ldbsearch -H /var/lib/samba/private/sam.ldb '(invocationid=samba2.samba4.lan)' --cross-ncs objectguid
> I am on debian so the folders are different. Maybe samba2 should not of been running when I joined.
> Thing is from the documentation if it isn't what do you do ?
>  From rsat active users & computers in the NTDS setting there is a DNS alias for samba2 of 932B87C9-27D2-451F-B16A-F30DFB9E39E1._msdcs.samba4.lan
> I throw up some virtual boxes all distro's with 4.1.6 and my noob instructions.
> The documentation is hard going guys sometimes because of to much from others, other distro's and previous versions.
> I think I am getting there but is anyone could answer the above.
> Many Thanks
> Stuart
> -----Original message-----
> > From:mourik jan heupink - merit <heupink at merit.unu.edu  <mailto:heupink at merit.unu.edu>>
> > Sent: Friday 28th March 2014 20:16
> > To:samba at lists.samba.org  <mailto:samba at lists.samba.org>
> > Subject: [Samba] small dns question
> >
> > Hi list,
> >
> > This weekend I'll be performing the samba3 -> samba4 tango :-)
> >
> > Anyway: I'll be setting up two DC's, and would like to know if they can
> > BOTH be a dns server for our AD domain, or if that 'role' is only for
> > the 'primary' DC?
> > ('primary' being to one who's sysvol is rsynced to the 'secondary')
> >
> > Because if they both have all dns knowledge, and can be dns server, this
> > would make the network much more robust. I could forward them to
> > different resolvers also.
> >
> > It's in the details, sometimes...
> >
> > Thanks!
> >
> >

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