[Samba] Samba 3.x server with LDAP backend doesn't work

Gollapalli, Prakash

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May 16, 2013, 11:27:54 AM5/16/13

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We have a central LDAP server for our enterprise on a Linux box. I have installed Samba 3.4.4 server on an AIX server and trying to get users authenticated via LDAP server. So far my efforts have been unsuccessful. Here is my ldap section of the smb.conf file:

passdb backend = ldapsam:ldaps://<company_ldap_server>/
ldap ssl = start tls
ldap suffix = dc=xxx,dc=yyy,dc=zzz
ldap delete dn = no
ldap user suffix = ou=People
ldap group suffix = ou=Groups

Here is the error I am seeing in the Samba errorlog:

[2013/05/16 11:08:14, 0] lib/smbldap.c:656(smb_ldap_start_tls)
Failed to issue the StartTLS instruction: Can't contact LDAP server
[2013/05/16 11:08:14, 1] lib/smbldap.c:1231(another_ldap_try)
Connection to LDAP server failed for the 1 try!

Is there a documented procedure on how to connect samba users to a backend ldap server?

Any help with is greatly appreciated

Thanks, Prakash
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miguel...@sapo.pt

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May 16, 2013, 11:50:23 AM5/16/13

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>
> Is there a documented procedure on how to connect samba users to a
> backend ldap server?
>

Chapter 5 of "Samba 3 by Example"

http://www.samba.org/samba/docs/man/Samba-Guide/happy.html

PDF version:

http://www.samba.org/samba/docs/Samba3-ByExample.pdf

Gaiseric Vandal

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May 16, 2013, 12:14:21 PM5/16/13

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Did you try w/o start TLS support? I realize this can have security
implications, so this is only to see if the problem is with TLS or with
the configuration in general.

It the LDAP server is on the same server as the samba server then I
don't think you will need TLS encryption, since there isn't LAN traffic
to snoop.

don't forget to set set the ldap password with "smbpasswd -w"

Also I think "ldaps" means ldap over SSL, not ldap+tls. I would also
use ldapclient tools (e.g. the command line ldapsearch or the gui Apache
Directory Studio ldap browser and editor) to make sure you can connect
to the ldap server via LDAP, LDAP+TLS and/or LDAPS-over-SSL. You
need to make sure you have all the certificates configured correctly.

On 05/16/13 11:27, Gollapalli, Prakash wrote:
> We have a central LDAP server for our enterprise on a Linux box. I have installed Samba 3.4.4 server on an AIX server and trying to get users authenticated via LDAP server. So far my efforts have been unsuccessful. Here is my ldap section of the smb.conf file:
>
> passdb backend = ldapsam:ldaps://<company_ldap_server>/
> ldap ssl = start tls
> ldap suffix = dc=xxx,dc=yyy,dc=zzz
> ldap delete dn = no
> ldap user suffix = ou=People
> ldap group suffix = ou=Groups
>
> Here is the error I am seeing in the Samba errorlog:
>
> [2013/05/16 11:08:14, 0] lib/smbldap.c:656(smb_ldap_start_tls)
> Failed to issue the StartTLS instruction: Can't contact LDAP server
> [2013/05/16 11:08:14, 1] lib/smbldap.c:1231(another_ldap_try)
> Connection to LDAP server failed for the 1 try!
>

> Is there a documented procedure on how to connect samba users to a backend ldap server?
>

> Any help with is greatly appreciated
>
> Thanks, Prakash
> **********************************************************
> Electronic Mail is not secure, may not be read every day, and should not be used for urgent or sensitive issues

Gollapalli, Prakash

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May 16, 2013, 4:44:04 PM5/16/13

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>Did you try w/o start TLS support? I realize this can have security
implications, so this is only to see if the problem is with TLS or with
the configuration in general.

I have tried without TLS support and without SSL (replaced ldaps with ldap)

passdb backend = ldapsam:ldap://<company_ldap_server>/
ldap ssl = off
ldap admin dn = cn=Adminid,dc=xxx,dc=yyy,dc=zzz

ldap suffix = dc=xxx,dc=yyy,dc=zzz
ldap delete dn = no
ldap user suffix = ou=People
ldap group suffix = ou=Groups

Now I get the following error:
[2013/05/16 16:38:14, 0] lib/smbldap.c:1052(smbldap_connect_system)
failed to bind to server ldap://<company_ldap_server>/ with dn="cn=Adminid,dc=xxx,dc=yyy,dc=zzz" Error: Confidentiality required
(unknown)

>It the LDAP server is on the same server as the samba server then I
don't think you will need TLS encryption, since there isn't LAN traffic
to snoop.

Our LDAP server is not on the same server. It is a central enterprise server

>don't forget to set set the ldap password with "smbpasswd -w"

I did this part for the Adminid

>Also I think "ldaps" means ldap over SSL, not ldap+tls. I would also
use ldapclient tools (e.g. the command line ldapsearch or the gui Apache
Directory Studio ldap browser and editor) to make sure you can connect
to the ldap server via LDAP, LDAP+TLS and/or LDAPS-over-SSL. You
need to make sure you have all the certificates configured correctly.

LDAP authentication works perfectly directly from our AIX server. I can do ldapsearches and can login with my ldap credentials etc.. Only samba authentication doesn't work

Gaiseric Vandal

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May 16, 2013, 5:37:10 PM5/16/13

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And just to clarify you can use ldapsearch with the samba admin
credentials as well?

What is the ldap server? (Openldap ?)