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Marcio Demetrio Bacci

2019-Jul-25 14:25 UTC

[Samba] Possible problems with AD Schema in Samba 4

Hi,

I found that the base of Samba 4 DC is different from the base of Windows
Server 2008 DC. There are many mistakes when  I make the comparison as the
result as follows (only parts of reult):

samba-tool ldapcmp ldap://WINDC1 ldap://SAMBA4-DC -Uadministrator
Password for [EMPRESA\administrator]:

* Comparing [DOMAIN] context...

* DN lists have different size: 1787 != 1788

* DNs found only in ldap://WINDC1:
    CN=TESTE-COMP,CN=COMPUTERS,DC=EMPRESA,DC=COM,DC=BR
    CN=MANE,CN=USERS,DC=EMPRESA,DC=COM,DC=BR

* DNs found only in ldap://SAMBA4-DC:
    CN=COMP300061111,CN=COMPUTERS,DC=EMPRESA,DC=COM,DC=BR
    CN=BB,CN=COMPUTERS,DC=EMPRESA,DC=COM,DC=BR
    CN=WMANE,CN=USERS,DC=EMPRESA,DC=COM,DC=BR

* Objects to be compared: 1785

...

Comparing:
'CN=SERGIO,CN=USERS,DC=EMPRESA,DC=COM,DC=BR' [ldap://WINDC1]
'CN=SERGIO,CN=USERS,DC=EMPRESA,DC=COM,DC=BR' [ldap://SAMBA4-DC]
    Difference in attribute values:
        lastLogonTimestamp =>
[b'132076662777728517']
[b'132084540442594920']

    FAILED

Comparing:
'CN=COMP10013,CN=COMPUTERS,DC=EMPRESA,DC=COM,DC=BR' [ldap://WINDC1]
'CN=COMP10013,CN=COMPUTERS,DC=EMPRESA,DC=COM,DC=BR' [ldap://SAMBA4-DC]
    Difference in attribute values:
        servicePrincipalName =>
[b'HOST/COMP10013', b'HOST/COMP10013.empresa.com.br',
b'RestrictedKrbHost/COMP10013',
b'RestrictedKrbHost/COMP10013.empresa.com.br',
b'TERMSRV/COMP10013', b'TERMSRV/ass10013.empresa.com.br']
[b'HOST/COMP10013', b'HOST/COMP10013.empresa.com.br',
b'RestrictedKrbHost/COMP10013',
b'RestrictedKrbHost/COMP10013.empresa.com.br',
b'TERMSRV/COMP10013', b'TERMSRV/COMP10013.empresa.com.br',
b'TERMSRV/
ass10013.empresa.com.br']

    FAILED


...

    FAILED
ERROR(<class 'KeyError'>): uncaught exception -
'mS-DS-CreatorSID'
  File "/usr/lib/python3/dist-packages/samba/netcmd/__init__.py", line
185,
in _run
    return self.run(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/samba/netcmd/ldapcmp.py", line
957,
in run
    if b1.diff(b2):
  File "/usr/lib/python3/dist-packages/samba/netcmd/ldapcmp.py", line
781,
in diff
    if object1 == object2:
  File "/usr/lib/python3/dist-packages/samba/netcmd/ldapcmp.py", line
549,
in __eq__
    return self.cmp_attrs(other)
  File "/usr/lib/python3/dist-packages/samba/netcmd/ldapcmp.py", line
590,
in cmp_attrs
    if isinstance(self.attributes[x], list) and
isinstance(other.attributes[x], list):


########################################

The Schema version of my Windows 2008 Server is 44 and I am using Samba
4.10.6-Debian:

ldbsearch -H /var/lib/samba/private/sam.ldb -b
'cn=Schema,cn=Configuration,dc=empresa,dc=com,dc=br' -s base
objectVersion
# record 1
dn: CN=Schema,CN=Configuration,DC=empresa,DC=com,DC=br
objectVersion: 44

# returned 1 records
# 1 entries
# 0 referrals

I believe that the problem is related as the Samba 4 works with AD Schema,
as found at: https://wiki.samba.org/index.php/AD_Schema_Version_Support

Would anyone have an idea how to solve this problem?

Regards,

M?rcio Bacci

Tim Beale

2019-Jul-26 01:21 UTC

head link

[Samba] Possible problems with AD Schema in Samba 4

I don't think the problem is the schema. It's more likely a replication
problem.

Firstly, the Samba schema is only used when you provision a new domain.
In this case you have joined an existing Windows domain, so you are
using the *Windows* schema. (I think it's actually impossible to
provision a Samba domain with the 2008 schema - Samba only supports
2008R2 onwards).

Secondly, ldapcmp is not complaining because the base schema objects are
different. It's complaining because ordinary objects (and their
attributes) in your domain are different. The most likely cause is that
the 2 DCs aren't replicating with each other properly.

Try checking 'samba-tool drs showrepl'.

On 26/07/19 2:25 AM, Marcio Demetrio Bacci via samba
wrote:> Hi,
>
> I found that the base of Samba 4 DC is different from the base of Windows
> Server 2008 DC. There are many mistakes when  I make the comparison as the
> result as follows (only parts of reult):
>
> samba-tool ldapcmp ldap://WINDC1 ldap://SAMBA4-DC -Uadministrator
> Password for [EMPRESA\administrator]:
>
> * Comparing [DOMAIN] context...
>
> * DN lists have different size: 1787 != 1788
>
> * DNs found only in ldap://WINDC1:
>     CN=TESTE-COMP,CN=COMPUTERS,DC=EMPRESA,DC=COM,DC=BR
>     CN=MANE,CN=USERS,DC=EMPRESA,DC=COM,DC=BR
>
> * DNs found only in ldap://SAMBA4-DC:
>     CN=COMP300061111,CN=COMPUTERS,DC=EMPRESA,DC=COM,DC=BR
>     CN=BB,CN=COMPUTERS,DC=EMPRESA,DC=COM,DC=BR
>     CN=WMANE,CN=USERS,DC=EMPRESA,DC=COM,DC=BR
>
> * Objects to be compared: 1785
>
> ...
>
> Comparing:
> 'CN=SERGIO,CN=USERS,DC=EMPRESA,DC=COM,DC=BR' [ldap://WINDC1]
> 'CN=SERGIO,CN=USERS,DC=EMPRESA,DC=COM,DC=BR' [ldap://SAMBA4-DC]
>     Difference in attribute values:
>         lastLogonTimestamp =>
> [b'132076662777728517']
> [b'132084540442594920']
>
>     FAILED
>
> Comparing:
> 'CN=COMP10013,CN=COMPUTERS,DC=EMPRESA,DC=COM,DC=BR' [ldap://WINDC1]
> 'CN=COMP10013,CN=COMPUTERS,DC=EMPRESA,DC=COM,DC=BR'
[ldap://SAMBA4-DC]
>     Difference in attribute values:
>         servicePrincipalName =>
> [b'HOST/COMP10013', b'HOST/COMP10013.empresa.com.br',
> b'RestrictedKrbHost/COMP10013',
b'RestrictedKrbHost/COMP10013.empresa.com.br',
> b'TERMSRV/COMP10013', b'TERMSRV/ass10013.empresa.com.br']
> [b'HOST/COMP10013', b'HOST/COMP10013.empresa.com.br',
> b'RestrictedKrbHost/COMP10013',
b'RestrictedKrbHost/COMP10013.empresa.com.br',
> b'TERMSRV/COMP10013', b'TERMSRV/COMP10013.empresa.com.br',
b'TERMSRV/
> ass10013.empresa.com.br']
>
>     FAILED
>
>
> ...
>
>     FAILED
> ERROR(<class 'KeyError'>): uncaught exception -
'mS-DS-CreatorSID'
>   File "/usr/lib/python3/dist-packages/samba/netcmd/__init__.py",
line 185,
> in _run
>     return self.run(*args, **kwargs)
>   File "/usr/lib/python3/dist-packages/samba/netcmd/ldapcmp.py",
line 957,
> in run
>     if b1.diff(b2):
>   File "/usr/lib/python3/dist-packages/samba/netcmd/ldapcmp.py",
line 781,
> in diff
>     if object1 == object2:
>   File "/usr/lib/python3/dist-packages/samba/netcmd/ldapcmp.py",
line 549,
> in __eq__
>     return self.cmp_attrs(other)
>   File "/usr/lib/python3/dist-packages/samba/netcmd/ldapcmp.py",
line 590,
> in cmp_attrs
>     if isinstance(self.attributes[x], list) and
> isinstance(other.attributes[x], list):
>
>
> ########################################
>
> The Schema version of my Windows 2008 Server is 44 and I am using Samba
> 4.10.6-Debian:
>
> ldbsearch -H /var/lib/samba/private/sam.ldb -b
> 'cn=Schema,cn=Configuration,dc=empresa,dc=com,dc=br' -s base
objectVersion
> # record 1
> dn: CN=Schema,CN=Configuration,DC=empresa,DC=com,DC=br
> objectVersion: 44
>
> # returned 1 records
> # 1 entries
> # 0 referrals
>
> I believe that the problem is related as the Samba 4 works with AD Schema,
> as found at: https://wiki.samba.org/index.php/AD_Schema_Version_Support
>
> Would anyone have an idea how to solve this problem?
>
> Regards,
>
> M?rcio Bacci

Tim Beale

2019-Jul-26 03:33 UTC

head link

[Samba] Possible problems with AD Schema in Samba 4

You could also try running: samba-tool visualize uptodateness -rS

If you see something other than '00' for a partition, it probably means
replication is out of date.

There's also some more info on checking the replication status here.
https://wiki.samba.org/index.php/Verifying_the_Directory_Replication_Statuses

On 26/07/19 1:21 PM, Tim Beale via samba wrote:> I don't think the problem is the schema. It's more likely a
replication
> problem.
>
> Firstly, the Samba schema is only used when you provision a new domain.
> In this case you have joined an existing Windows domain, so you are
> using the *Windows* schema. (I think it's actually impossible to
> provision a Samba domain with the 2008 schema - Samba only supports
> 2008R2 onwards).
>
> Secondly, ldapcmp is not complaining because the base schema objects are
> different. It's complaining because ordinary objects (and their
> attributes) in your domain are different. The most likely cause is that
> the 2 DCs aren't replicating with each other properly.
>
> Try checking 'samba-tool drs showrepl'.
>
> On 26/07/19 2:25 AM, Marcio Demetrio Bacci via samba wrote:
>> Hi,
>>
>> I found that the base of Samba 4 DC is different from the base of
Windows
>> Server 2008 DC. There are many mistakes when  I make the comparison as
the
>> result as follows (only parts of reult):
>>
>> samba-tool ldapcmp ldap://WINDC1 ldap://SAMBA4-DC -Uadministrator
>> Password for [EMPRESA\administrator]:
>>
>> * Comparing [DOMAIN] context...
>>
>> * DN lists have different size: 1787 != 1788
>>
>> * DNs found only in ldap://WINDC1:
>>     CN=TESTE-COMP,CN=COMPUTERS,DC=EMPRESA,DC=COM,DC=BR
>>     CN=MANE,CN=USERS,DC=EMPRESA,DC=COM,DC=BR
>>
>> * DNs found only in ldap://SAMBA4-DC:
>>     CN=COMP300061111,CN=COMPUTERS,DC=EMPRESA,DC=COM,DC=BR
>>     CN=BB,CN=COMPUTERS,DC=EMPRESA,DC=COM,DC=BR
>>     CN=WMANE,CN=USERS,DC=EMPRESA,DC=COM,DC=BR
>>
>> * Objects to be compared: 1785
>>
>> ...
>>
>> Comparing:
>> 'CN=SERGIO,CN=USERS,DC=EMPRESA,DC=COM,DC=BR' [ldap://WINDC1]
>> 'CN=SERGIO,CN=USERS,DC=EMPRESA,DC=COM,DC=BR' [ldap://SAMBA4-DC]
>>     Difference in attribute values:
>>         lastLogonTimestamp =>
>> [b'132076662777728517']
>> [b'132084540442594920']
>>
>>     FAILED
>>
>> Comparing:
>> 'CN=COMP10013,CN=COMPUTERS,DC=EMPRESA,DC=COM,DC=BR'
[ldap://WINDC1]
>> 'CN=COMP10013,CN=COMPUTERS,DC=EMPRESA,DC=COM,DC=BR'
[ldap://SAMBA4-DC]
>>     Difference in attribute values:
>>         servicePrincipalName =>
>> [b'HOST/COMP10013', b'HOST/COMP10013.empresa.com.br',
>> b'RestrictedKrbHost/COMP10013',
b'RestrictedKrbHost/COMP10013.empresa.com.br',
>> b'TERMSRV/COMP10013',
b'TERMSRV/ass10013.empresa.com.br']
>> [b'HOST/COMP10013', b'HOST/COMP10013.empresa.com.br',
>> b'RestrictedKrbHost/COMP10013',
b'RestrictedKrbHost/COMP10013.empresa.com.br',
>> b'TERMSRV/COMP10013',
b'TERMSRV/COMP10013.empresa.com.br', b'TERMSRV/
>> ass10013.empresa.com.br']
>>
>>     FAILED
>>
>>
>> ...
>>
>>     FAILED
>> ERROR(<class 'KeyError'>): uncaught exception -
'mS-DS-CreatorSID'
>>   File
"/usr/lib/python3/dist-packages/samba/netcmd/__init__.py", line 185,
>> in _run
>>     return self.run(*args, **kwargs)
>>   File
"/usr/lib/python3/dist-packages/samba/netcmd/ldapcmp.py", line 957,
>> in run
>>     if b1.diff(b2):
>>   File
"/usr/lib/python3/dist-packages/samba/netcmd/ldapcmp.py", line 781,
>> in diff
>>     if object1 == object2:
>>   File
"/usr/lib/python3/dist-packages/samba/netcmd/ldapcmp.py", line 549,
>> in __eq__
>>     return self.cmp_attrs(other)
>>   File
"/usr/lib/python3/dist-packages/samba/netcmd/ldapcmp.py", line 590,
>> in cmp_attrs
>>     if isinstance(self.attributes[x], list) and
>> isinstance(other.attributes[x], list):
>>
>>
>> ########################################
>>
>> The Schema version of my Windows 2008 Server is 44 and I am using Samba
>> 4.10.6-Debian:
>>
>> ldbsearch -H /var/lib/samba/private/sam.ldb -b
>> 'cn=Schema,cn=Configuration,dc=empresa,dc=com,dc=br' -s base
objectVersion
>> # record 1
>> dn: CN=Schema,CN=Configuration,DC=empresa,DC=com,DC=br
>> objectVersion: 44
>>
>> # returned 1 records
>> # 1 entries
>> # 0 referrals
>>
>> I believe that the problem is related as the Samba 4 works with AD
Schema,
>> as found at: https://wiki.samba.org/index.php/AD_Schema_Version_Support
>>
>> Would anyone have an idea how to solve this problem?
>>
>> Regards,
>>
>> M?rcio Bacci

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