Why do I get a failed to connect to LDAP URL when using Samba's Ldb Python module?

[Richard Sharpe]

On Fri, Aug 14, 2015 at 1:59 PM, Richard Sharpe
<realrichardsharpe at gmail.com> wrote:
> Hi folks,
>
> I just got this:
>
>    >>> from samba import Ldb
>    >>> ldb_obj =
> Ldb('ldap://drtnasdcprod01.xxxx.yyyy.eng.someorg.com',
> credentials=creds)
>    Failed to connect to ldap URL
> 'ldap://drtnasdcprod01.xxxx.yyyy.eng.someorg.com' - LDAP client
> internal error: NT_STATUS_BAD_NETWORK_NAME
>    Failed to connect to
> 'ldap://drtnasdcprod01.xxxx.yyyy.eng.someorg.com' with backend
> 'ldap':(null)
>    Traceback (most recent call last):
>      File "<stdin>", line 1, in <module>
>      File "/usr/lib64/python2.6/site-packages/samba/__init__.py", line
> 114, in __init__
>         self.connect(url, flags, options)
>    _ldb.LdbError: (1, None)
>
> It looked so easy ... but wasn't.
>
> What have I done wrong?

OK, I seem to have made some progress on this:

   >>> from samba.credentials import DONT_USE_KERBEROS
   >>> creds = Credentials()
   >>> creds.set_kerberos_state(DONT_USE_KERBEROS)
   >>> creds.set_username('administrator')
   >>> creds.set_password("some-pass")
   >>> creds.set_forced_sasl_mech("EXTERNAL")
   >>> ldb_obj = Ldb("ldap://10.4.45.1", credentials=creds)
   Failed to bind - LDAP error 49 LDAP_INVALID_CREDENTIALS -
<80090308: LdapErr: DSID-0C0903A9, comment: AcceptSecurityContext
error, data 52e, v1db1> <>
   Failed to connect to 'ldap://10.4.45.1' with backend 'ldap': (null)
   Traceback (most recent call last):
     File "<stdin>", line 1, in <module>
     File "/usr/lib64/python2.6/site-packages/samba/__init__.py", line
114, in __init__
       self.connect(url, flags, options)
   _ldb.LdbError: (49, None)

However, it always tries to use simple auth and fails as above. I do
see LDAP bind requests now, however.

Any ideas as to what I am doing wrong?

-- 
Regards,
Richard Sharpe
(何以解憂？唯有杜康。--曹操)