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Alan Hughes

2016-Jul-08 11:37 UTC

[Samba] Samba update to 4.2.14 (SERNET) breaks LDAP access

Last night we updated out Samba-4 AD server to version 4.2.14 usng the SERNEt
packages, running on SLES 12. We have a number of services (mail services,
MANTIS, etc) that access the server via the LDAP interface and in all cases we
discovered that none of them where able to establish a successful LDAP
connection after the upgrade.

 
Previously we used plain LDAP to access the server, i.e. we did not use SSL/TLS.
However it appears that the Samba-4 server is now insisting on using SSL/TLS
regardless of the settings; if I attempt to perform an LDAP query without
SSL/TLS I get:

 
ldapsearch -H 'ldap://172.16.6.2:389/' -D *** -w *** -b **
ldap_bind: Strong(er) authentication required (8)
        additional info: BindSimple: Transport encryption required.

 
Note that this used to work prior to the upgrade.

 
Attempting to access via TLS:

 
ldapsearch -H 'ldap://172.16.6.2:389/' -D *** -w *** -b ** -Z
ldap_bind: Strong(er) authentication required (8)
        additional info: BindSimple: Transport encryption required.

 
Attempting to access via SSL:

 
ldapsearch -H 'ldaps://172.16.6.2:636/' -D *** -w *** -b **
ldap_sasl_bind(SIMPLE): Can't contact LDAP server (-1)

 
Note that we have not installed any certificates since we are not wanting to use
encrypted connections at the moment.

 
Setting "enable tls = no" in "smb.conf" does not work - we
see the same as above.

 
Does anyone have any ideas? I'm stuck on this.

 
Further information (just in case someone thinks it might be useful - the global
section from our "smb.conf" file:

 
[global]
        workgroup = E2E
        realm = AD.CORPORATE.E2E
        netbios name = JANUS
        server role = active directory domain controller
        server services = -dns, -dnsupdate, -winbind, +winbindd
        dns forwarder = 217.13.128.17
        idmap_ldb:use rfc2307 = yes
        idmap config E2E:backend = ad
        idmap config E2E:schema_mode = rfc2307
        idmap config E2E:range = 10000-40000
        idmap config *:backend = tdb
        idmap config *:range = 2000-9999
        winbind nss info = rfc2307
        rpc_server:spoolss = external
        rpc_daemon:spoolssd = fork

 
Port status:

 
tcp        0      0 0.0.0.0:1024            0.0.0.0:*               LISTEN     
12317/samba
tcp        0      0 0.0.0.0:3268            0.0.0.0:*               LISTEN     
12321/samba
tcp        0      0 0.0.0.0:3269            0.0.0.0:*               LISTEN     
12321/samba
tcp        0      0 0.0.0.0:389             0.0.0.0:*               LISTEN     
12321/samba
tcp        0      0 0.0.0.0:135             0.0.0.0:*               LISTEN     
12317/samba
tcp        0      0 0.0.0.0:464             0.0.0.0:*               LISTEN     
12323/samba
tcp        0      0 0.0.0.0:88              0.0.0.0:*               LISTEN     
12323/samba
tcp        0      0 0.0.0.0:636             0.0.0.0:*               LISTEN     
12321/samba
tcp        0      0 :::1024                 :::*                    LISTEN     
12317/samba
tcp        0      0 :::3268                 :::*                    LISTEN     
12321/samba
tcp        0      0 :::3269                 :::*                    LISTEN     
12321/samba
tcp        0      0 :::389                  :::*                    LISTEN     
12321/samba
tcp        0      0 :::135                  :::*                    LISTEN     
12317/samba
tcp        0      0 :::464                  :::*                    LISTEN     
12323/samba
tcp        0      0 :::88                   :::*                    LISTEN     
12323/samba
tcp        0      0 :::636                  :::*                    LISTEN     
12321/samba
 
Thanks in advance.

 
Alan

Guilherme Boing

2016-Jul-08 11:59 UTC

head link

[Samba] Samba update to 4.2.14 (SERNET) breaks LDAP access

Hello Alan,

I had the same issue and I needed to add this line:
ldap server require strong auth = no

to smb.conf.

Then, just restart/reload samba and it should work.

On Fri, Jul 8, 2016 at 8:37 AM, Alan Hughes <alanhughes at
e2eservices.co.uk>
wrote:
> Last night we updated out Samba-4 AD server to version 4.2.14 usng the
> SERNEt packages, running on SLES 12. We have a number of services (mail
> services, MANTIS, etc) that access the server via the LDAP interface and in
> all cases we discovered that none of them where able to establish a
> successful LDAP connection after the upgrade.
>
>
> Previously we used plain LDAP to access the server, i.e. we did not use
> SSL/TLS. However it appears that the Samba-4 server is now insisting on
> using SSL/TLS regardless of the settings; if I attempt to perform an LDAP
> query without SSL/TLS I get:
>
>
> ldapsearch -H 'ldap://172.16.6.2:389/' -D *** -w *** -b **
> ldap_bind: Strong(er) authentication required (8)
>         additional info: BindSimple: Transport encryption required.
>
>
> Note that this used to work prior to the upgrade.
>
>
> Attempting to access via TLS:
>
>
> ldapsearch -H 'ldap://172.16.6.2:389/' -D *** -w *** -b ** -Z
> ldap_bind: Strong(er) authentication required (8)
>         additional info: BindSimple: Transport encryption required.
>
>
> Attempting to access via SSL:
>
>
> ldapsearch -H 'ldaps://172.16.6.2:636/' -D *** -w *** -b **
> ldap_sasl_bind(SIMPLE): Can't contact LDAP server (-1)
>
>
> Note that we have not installed any certificates since we are not wanting
> to use encrypted connections at the moment.
>
>
> Setting "enable tls = no" in "smb.conf" does not work -
we see the same as
> above.
>
>
> Does anyone have any ideas? I'm stuck on this.
>
>
> Further information (just in case someone thinks it might be useful - the
> global section from our "smb.conf" file:
>
>
> [global]
>         workgroup = E2E
>         realm = AD.CORPORATE.E2E
>         netbios name = JANUS
>         server role = active directory domain controller
>         server services = -dns, -dnsupdate, -winbind, +winbindd
>         dns forwarder = 217.13.128.17
>         idmap_ldb:use rfc2307 = yes
>         idmap config E2E:backend = ad
>         idmap config E2E:schema_mode = rfc2307
>         idmap config E2E:range = 10000-40000
>         idmap config *:backend = tdb
>         idmap config *:range = 2000-9999
>         winbind nss info = rfc2307
>         rpc_server:spoolss = external
>         rpc_daemon:spoolssd = fork
>
>
> Port status:
>
>
> tcp        0      0 0.0.0.0:1024            0.0.0.0:*
> LISTEN      12317/samba
> tcp        0      0 0.0.0.0:3268            0.0.0.0:*
> LISTEN      12321/samba
> tcp        0      0 0.0.0.0:3269            0.0.0.0:*
> LISTEN      12321/samba
> tcp        0      0 0.0.0.0:389             0.0.0.0:*
> LISTEN      12321/samba
> tcp        0      0 0.0.0.0:135             0.0.0.0:*
> LISTEN      12317/samba
> tcp        0      0 0.0.0.0:464             0.0.0.0:*
> LISTEN      12323/samba
> tcp        0      0 0.0.0.0:88              0.0.0.0:*
> LISTEN      12323/samba
> tcp        0      0 0.0.0.0:636             0.0.0.0:*
> LISTEN      12321/samba
> tcp        0      0 :::1024                 :::*
> LISTEN      12317/samba
> tcp        0      0 :::3268                 :::*
> LISTEN      12321/samba
> tcp        0      0 :::3269                 :::*
> LISTEN      12321/samba
> tcp        0      0 :::389                  :::*
> LISTEN      12321/samba
> tcp        0      0 :::135                  :::*
> LISTEN      12317/samba
> tcp        0      0 :::464                  :::*
> LISTEN      12323/samba
> tcp        0      0 :::88                   :::*
> LISTEN      12323/samba
> tcp        0      0 :::636                  :::*
> LISTEN      12321/samba
>
> Thanks in advance.
>
>
> Alan
>
> --
> To unsubscribe from this list go to the following URL and read the
> instructions:  https://lists.samba.org/mailman/options/samba
>

Alan Hughes

2016-Jul-08 12:01 UTC

head link

[Samba] Samba update to 4.2.14 (SERNET) breaks LDAP access

Yep that fixed it. I found out (at the same time as the reply Guilherme arrived
in my inbox)  that option was added in 4.2.10. Added to smb.conf and everything
is now working again.

 
Alan
 
-----Original message-----
From:Guilherme Boing <kolt+samba at frag.com.br>
Sent:Fri 08-07-2016 12:59
Subject:Re: [Samba] Samba update to 4.2.14 (SERNET) breaks LDAP access
To:Alan Hughes <alanhughes at e2eservices.co.uk>; 
CC:samba at lists.samba.org; 
 
Hello Alan,
 I had the same issue and I needed to add this line:
ldap server require strong auth = no
 to smb.conf.
 Then, just restart/reload samba and it should work.

On Fri, Jul 8, 2016 at 8:37 AM, Alan Hughes <alanhughes at
e2eservices.co.uk> wrote:
Last night we updated out Samba-4 AD server to version 4.2.14 usng the SERNEt
packages, running on SLES 12. We have a number of services (mail services,
MANTIS, etc) that access the server via the LDAP interface and in all cases we
discovered that none of them where able to establish a successful LDAP
connection after the upgrade.
 
  
 Previously we used plain LDAP to access the server, i.e. we did not use
SSL/TLS. However it appears that the Samba-4 server is now insisting on using
SSL/TLS regardless of the settings; if I attempt to perform an LDAP query
without SSL/TLS I get:
 
  
 ldapsearch -H 'ldap://172.16.6.2:389/' -D *** -w *** -b **
 ldap_bind: Strong(er) authentication required (8)
         additional info: BindSimple: Transport encryption required.
 
  
 Note that this used to work prior to the upgrade.
 
  
 Attempting to access via TLS:
 
  
 ldapsearch -H 'ldap://172.16.6.2:389/' -D *** -w *** -b ** -Z
 ldap_bind: Strong(er) authentication required (8)
         additional info: BindSimple: Transport encryption required.
 
  
 Attempting to access via SSL:
 
  
 ldapsearch -H 'ldaps://172.16.6.2:636/' -D *** -w *** -b **
 ldap_sasl_bind(SIMPLE): Can't contact LDAP server (-1)
 
  
 Note that we have not installed any certificates since we are not wanting to
use encrypted connections at the moment.
 
  
 Setting "enable tls = no" in "smb.conf" does not work - we
see the same as above.
 
  
 Does anyone have any ideas? I'm stuck on this.
 
  
 Further information (just in case someone thinks it might be useful - the
global section from our "smb.conf" file:
 
  
 [global]
         workgroup = E2E
         realm = AD.CORPORATE.E2E
         netbios name = JANUS
         server role = active directory domain controller
         server services = -dns, -dnsupdate, -winbind, +winbindd
         dns forwarder = 217.13.128.17
         idmap_ldb:use rfc2307 = yes
         idmap config E2E:backend = ad
         idmap config E2E:schema_mode = rfc2307
         idmap config E2E:range = 10000-40000
         idmap config *:backend = tdb
         idmap config *:range = 2000-9999
         winbind nss info = rfc2307
         rpc_server:spoolss = external
         rpc_daemon:spoolssd = fork
 
  
 Port status:
 
  
 tcp        0      0 0.0.0.0:1024            0.0.0.0:*               LISTEN     
12317/samba
 tcp        0      0 0.0.0.0:3268            0.0.0.0:*               LISTEN     
12321/samba
 tcp        0      0 0.0.0.0:3269            0.0.0.0:*               LISTEN     
12321/samba
 tcp        0      0 0.0.0.0:389             0.0.0.0:*               LISTEN     
12321/samba
 tcp        0      0 0.0.0.0:135             0.0.0.0:*               LISTEN     
12317/samba
 tcp        0      0 0.0.0.0:464             0.0.0.0:*               LISTEN     
12323/samba
 tcp        0      0 0.0.0.0:88              0.0.0.0:*               LISTEN     
12323/samba
 tcp        0      0 0.0.0.0:636             0.0.0.0:*               LISTEN     
12321/samba
 tcp        0      0 :::1024                 :::*                    LISTEN     
12317/samba
 tcp        0      0 :::3268                 :::*                    LISTEN     
12321/samba
 tcp        0      0 :::3269                 :::*                    LISTEN     
12321/samba
 tcp        0      0 :::389                  :::*                    LISTEN     
12321/samba
 tcp        0      0 :::135                  :::*                    LISTEN     
12317/samba
 tcp        0      0 :::464                  :::*                    LISTEN     
12323/samba
 tcp        0      0 :::88                   :::*                    LISTEN     
12323/samba
 tcp        0      0 :::636                  :::*                    LISTEN     
12321/samba
  
 Thanks in advance.
 
  
 Alan
 
 --
 To unsubscribe from this list go to the following URL and read the
 instructions:  https://lists.samba.org/mailman/options/samba

L.P.H. van Belle

2016-Jul-08 12:02 UTC

head link

[Samba] Samba update to 4.2.14 (SERNET) breaks LDAP access

Hai, 

Please read : 

https://www.samba.org/samba/history/ 
from 12 April 2016 and below that. 
Samba 4.4.2, 4.3.8 and 4.2.11 Security Releases Available for Download

What you see is correct. 

And> Note that we have not installed any certificates since we are not wanting
> to use encrypted connections at the moment. 
Then set : 
ldap server require strong auth = no 

but please read the change logs it explains all. 

Greetz, 

Louis

> -----Oorspronkelijk bericht-----
> Van: samba [mailto:samba-bounces at lists.samba.org] Namens Alan Hughes
> Verzonden: vrijdag 8 juli 2016 13:37
> Aan: samba at lists.samba.org
> Onderwerp: [Samba] Samba update to 4.2.14 (SERNET) breaks LDAP access
> 
> Last night we updated out Samba-4 AD server to version 4.2.14 usng the
> SERNEt packages, running on SLES 12. We have a number of services (mail
> services, MANTIS, etc) that access the server via the LDAP interface and
> in all cases we discovered that none of them where able to establish a
> successful LDAP connection after the upgrade.
> 
> 
> Previously we used plain LDAP to access the server, i.e. we did not use
> SSL/TLS. However it appears that the Samba-4 server is now insisting on
> using SSL/TLS regardless of the settings; if I attempt to perform an LDAP
> query without SSL/TLS I get:
> 
> 
> ldapsearch -H 'ldap://172.16.6.2:389/' -D *** -w *** -b **
> ldap_bind: Strong(er) authentication required (8)
>         additional info: BindSimple: Transport encryption required.
> 
> 
> Note that this used to work prior to the upgrade.
> 
> 
> Attempting to access via TLS:
> 
> 
> ldapsearch -H 'ldap://172.16.6.2:389/' -D *** -w *** -b ** -Z
> ldap_bind: Strong(er) authentication required (8)
>         additional info: BindSimple: Transport encryption required.
> 
> 
> Attempting to access via SSL:
> 
> 
> ldapsearch -H 'ldaps://172.16.6.2:636/' -D *** -w *** -b **
> ldap_sasl_bind(SIMPLE): Can't contact LDAP server (-1)
> 
> 
> Note that we have not installed any certificates since we are not wanting
> to use encrypted connections at the moment.
> 
> 
> Setting "enable tls = no" in "smb.conf" does not work -
we see the same as
> above.
> 
> 
> Does anyone have any ideas? I'm stuck on this.
> 
> 
> Further information (just in case someone thinks it might be useful - the
> global section from our "smb.conf" file:
> 
> 
> [global]
>         workgroup = E2E
>         realm = AD.CORPORATE.E2E
>         netbios name = JANUS
>         server role = active directory domain controller
>         server services = -dns, -dnsupdate, -winbind, +winbindd
>         dns forwarder = 217.13.128.17
>         idmap_ldb:use rfc2307 = yes
>         idmap config E2E:backend = ad
>         idmap config E2E:schema_mode = rfc2307
>         idmap config E2E:range = 10000-40000
>         idmap config *:backend = tdb
>         idmap config *:range = 2000-9999
>         winbind nss info = rfc2307
>         rpc_server:spoolss = external
>         rpc_daemon:spoolssd = fork
> 
> 
> Port status:
> 
> 
> tcp        0      0 0.0.0.0:1024            0.0.0.0:*
> LISTEN      12317/samba
> tcp        0      0 0.0.0.0:3268            0.0.0.0:*
> LISTEN      12321/samba
> tcp        0      0 0.0.0.0:3269            0.0.0.0:*
> LISTEN      12321/samba
> tcp        0      0 0.0.0.0:389             0.0.0.0:*
> LISTEN      12321/samba
> tcp        0      0 0.0.0.0:135             0.0.0.0:*
> LISTEN      12317/samba
> tcp        0      0 0.0.0.0:464             0.0.0.0:*
> LISTEN      12323/samba
> tcp        0      0 0.0.0.0:88              0.0.0.0:*
> LISTEN      12323/samba
> tcp        0      0 0.0.0.0:636             0.0.0.0:*
> LISTEN      12321/samba
> tcp        0      0 :::1024                 :::*
> LISTEN      12317/samba
> tcp        0      0 :::3268                 :::*
> LISTEN      12321/samba
> tcp        0      0 :::3269                 :::*
> LISTEN      12321/samba
> tcp        0      0 :::389                  :::*
> LISTEN      12321/samba
> tcp        0      0 :::135                  :::*
> LISTEN      12317/samba
> tcp        0      0 :::464                  :::*
> LISTEN      12323/samba
> tcp        0      0 :::88                   :::*
> LISTEN      12323/samba
> tcp        0      0 :::636                  :::*
> LISTEN      12321/samba
> 
> Thanks in advance.
> 
> 
> Alan
> 
> --
> To unsubscribe from this list go to the following URL and read the
> instructions:  https://lists.samba.org/mailman/options/samba

Marc Muehlfeld

2016-Jul-08 15:05 UTC

head link

[Samba] Samba update to 4.2.14 (SERNET) breaks LDAP access

Hello Alan,

Am 08.07.2016 um 13:37 schrieb Alan Hughes:> Last night we updated out Samba-4 AD server to version 4.2.14
> usng the SERNEt packages, running on SLES 12.
Always check the release notes for new versions - including the ones
you're skipping.

This one contains the information you're looking for:
https://www.samba.org/samba/history/samba-4.2.10.html


And here in less technical words: :-)
https://wiki.samba.org/index.php/Updating_Samba#Default_for_LDAP_Connections_Requires_Strong_Authentication_.28updating_from_.3C.3D4.4.0.2C_.3C.3D4.3.6_or_.3C.3D4.2.9.29


Regards,
Marc

Marc Muehlfeld

2016-Jul-09 09:33 UTC

head link

[Samba] Samba update to 4.2.14 (SERNET) breaks LDAP access

Am 08.07.2016 um 17:12 schrieb Alan Hughes:> Thanks, I realise that now. I discovered the info from the release
> notes at about the same time that the first reply came in from the
> list. Everything is working now.
>
> However it would be useful if
> changes that might break existing configurations (because of changes
> in behaviour or defaults that are now being applied correctly) are
> highlighted a bit more prominently.
I agree. It was not very good visible in the release note that
introduced this. I know a lot of people, and we had this often here on
the list as well, who run into this issue or temporarily broke stuff
hooked up to AD by LDAP.

However a good place to look at before you're updating, is
https://wiki.samba.org/index.php/Updating_Samba#Other_changes_you_should_pay_attention_to.2C_when_updating

It lists the major things, you should pay attention to.



Regards,
Marc

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