[Samba] Samba 4 AD BDC (Syncrepl)

[Alex Crow]

On 25/01/17 14:55, basti via samba wrote:
> Hello,
>
> at the Moment we use and Samba 4 in NT4-style Domain with approx. 20
> Clients.
>
> With the Problem of Windows 10 to join to NT4-style
> (https://wiki.samba.org/index.php/Required_Settings_for_Samba_NT4_Domains#Windows_10:_There_Are_Currently_No_Logon_Servers_Available_to_Service_the_Logon_Request)
> we plan to migrate to Samba AD.
>
> At the Moment there is the following scheme:
>
> samba PDC (Fileserver) -> Openldap syncrepl to Mailserver (to receive
> mails if PDC is down)
>
> As I can read Samba LDAP can't sync to OpenLDAP and it's not recomment
> to run PDC on Fileserver.
> What is the best way?
>
> samba PDC (kvm vm/ host1) <- drs -> Samba BDC (kvm vm/ host2)
>
> Fileserver, get users via pam_ldap from PDC.
> Mailserver, get users via pam_ldap from PDC.
>
> How does the mailserver know to ask the bdc if pdc is down?
>
> Or should I place the bdc on mailserver?
>
>
> Best Regards,
> Basti
>

Hi,

You can't replicate between AD and OpenLDAP.

There are two ways to go (and you should avoid using a DC as a
fileserver, it may work for you but it's less painful to just set up new
DCs)

1) Change your mail server to talk to AD, preferably set up multiple AD
DCs and have them fail over. Dovecot and Postfix make this very easy.
2) Set up a caching OpenLDAP proxy to AD, point the backend LDAP DB to
all your DCs. OpenLDAP have docs on a proxy cache, it's quite easy to
get it working. You may need to tune your queries and timeouts.

Cheers

Alex

--
This message is intended only for the addressee and may contain
confidential information. Unless you are that person, you may not
disclose its contents or use it in any way and are requested to delete
the message along with any attachments and notify us immediately.
This email is not intended to, nor should it be taken to, constitute advice.
The information provided is correct to our knowledge & belief and must not
be used as a substitute for obtaining tax, regulatory, investment, legal or
any other appropriate advice.

"Transact" is operated by Integrated Financial Arrangements Ltd.
29 Clement's Lane, London EC4N 7AE. Tel: (020) 7608 4900 Fax: (020) 7608 5300.
(Registered office: as above; Registered in England and Wales under
number: 3727592). Authorised and regulated by the Financial Conduct
Authority (entered on the Financial Services Register; no. 190856).