pythondjangoactive-directoryldapsamba

How to create a ldap BIND_DN for samba active directory

I am trying to setup samba active directory users authentication for my Django app. I working in linux. I don't have access to windows active directory. I got a docker image smblds for samba AD DC on Ubuntu 22.04 using

docker run --name smblds \
           --publish 389:389 \
           --publish 636:636 \
           --detach smblds/smblds:latest

The docker started fine. I can see the smb.conf and other tdb files created.

But this docker does not set the BIND_DN value. So, I executed the docker and from inside the smblds docker I provisioned the active directory with

samba-tool domain provision --use-rfc2307 --interactive

I used all the default settings for Realm, Domain, server role, dns backend and Administrator password I see following messages in the output

Setting up self join
Repacking database from v1 to v2 format (first record CN=ms-WMI-StringSetParam,CN=Schema,CN=Configuration,DC=samdom,DC=example,DC=com)
Repack: re-packed 10000 records so far
Repacking database from v1 to v2 format (first record CN=server-Display,CN=409,CN=DisplaySpecifiers,CN=Configuration,DC=samdom,DC=example,DC=com)
Repacking database from v1 to v2 format (first record CN=51cba88b-99cf-4e16-bef2-c427b38d0767,CN=Operations,CN=DomainUpdates,CN=System,DC=samdom,DC=example,DC=com)

Is any of these a BIND_DN. Actually when I try to connect to active directory using python ldap I see invalid credential error.

>>> import ldap
>>> ldap_server = ldap.initialize("ldap://172.17.0.5/")
>>> ldap_server.set_option(ldap.OPT_X_TLS_REQUIRE_CERT, ldap.OPT_X_TLS_ALLOW)
>>> ldap_server.set_option(ldap.OPT_X_TLS_NEWCTX, 0)
>>> ldap_server.start_tls_s()
>>> ldap_server.simple_bind_s("CN=ms-WMI-StringSetParam,CN=Schema,CN=Configuration,DC=samdom,DC=example,DC=com", "Passw0rd")

ldap.INVALID_CREDENTIALS: {'msgtype': 97, 'msgid': 3, 'result': 49, 'desc': 'Invalid credentials', 'ctrls': [], 'info': '80090308: LdapErr: DSID-0C0903A9, comment: AcceptSecurityContext error, data 52e, v1db1'}

I know I set the password during provisioning. But what is the initial BIND_DN that I can use to bind with the samba active directory in the ldap_server.simple_bind_s call?

Basically is there any BIND_DN created for the samba active directory like it is for openLDAP? If not how do I connect to samba active directory?

Thank you

Solution

  • "Bind DNs" are DNs that represent user accounts. This works in Active Directory the same as in other LDAP services.

    The standard user account that exists in fresh AD installations – certain to be the one that you've set a password for – is Administrator which is placed in the default Users container; its DN might therefore be CN=Administrator,CN=Users,DC=ad,DC=example,DC=com.

    As a special case, Active Directory DCs (including Samba) allow you to directly specify a non-DN username in the "bind DN" field (either in the AD UPN user@domain.tld format or in the NT4 DOMAIN\user format), so you should also be able to bind as Administrator@ad.example.com.

    You could also bypass the procedure using a Kerberos (GSSAPI or GSS-SPNEGO) bind instead of a plaintext password. In a full AD environment (i.e. properly configured DNS) you would be able to kinit as Administrator@AD.EXAMPLE.COM and invoke .sasl_gssapi_bind_s()1.

    1 (More precisely it should be .sasl_non_interactive_bind_s("GSS-SPNEGO") for AD.)