1 # $Source: /opt/cvs/samba/smbldap-tools/INFRA,v $
3 ## Some notes about the architecture
6 Global Architecture for smbdlap-tools
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9 smbldap-tools help you manage users and groups for Unix and Samba,
10 using LDAP. They may be used in any context, and are kept relatively
11 simplier enought to let you customize them to you needs.
13 They need the following objectClasses to work:
14 . sambaAccount: from samba.schema for Samba 2.2 branch
15 . posixAccount and posixGroup : from nis.schema
16 . organizationalUnit and dcObject: from core.schema
18 They will probably use in a near future some additional objectClasses
20 . mail features (sendmail/postfix/qmail/courier).
21 . conform to RFC2307 best practices (and so some maps too like merging
22 Netbios computers (sambaAccounts) with ipHosts
24 For ease of visualization of the LDAP objects by human standards, we
25 used a DIT like this one :
26 . dc=IDEALX,dc=org : the company/organization suffix
27 . ou=Users : to store users accounts
28 . ou=Computers : to store computers accounts
29 . ou=Groups : to store system groups
30 Of course, you're free to use a different naming scheme and DIT (see
34 Built in groups initial population
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37 smbldap-populate.pl populate the LDAP directory with some built in groups
38 using gidNumber according to Well Know RID of Windows NT4 Srv. In fact, As
39 far a Samba 2.2.x is concerned, only the 'Domain Admins' (gidNumber 512) have
40 real inpact on the Samba and Windows population. To activate this group as
41 the Domain Administrators Group, use the following smb.conf directive (see
42 man smb.conf for more):
44 domain admin group = " @"Domain Admins" "
46 However, to make pdb_ldap accept bind without being uid=0, a quick and
47 dirty patch must be applied to 2.2.4 (see samba-2.2.4-ldapbindnotuid0.patch).
48 This patch is Q&D because the check is there because Samba store admin
49 credentials to establish the LDAP connection. The uid == 0 check was to
50 ensure that a normal user could not get write access to the LDAP backend.
51 A more logical situation should be done for 2.2.5 by checking if the user
52 is a member of the domain admin group (reported to Jerremy and Gerald
55 Other built in groups are really cosmetic ones with Samba 2.2.x. We did not
56 removed them because one of these days, we whish to use Samba 3.0 where
57 Windows Group Support should be operational.
59 Why these specific gidNumbers ?
60 It's about unix/windows mapping of numerical ids with Samba. Ids below 1024
61 are NT special ids. In fact, 512 is the RID (Windows uid/gid) for the
62 "Domain Administrators" NT group. The magic number is found in Samba sources
63 and possibly other Samba/Windows documentations.
65 The goal is to have a set of Unix users who are Domain Administrators and can
66 modify Samba datas (eg. LDAP content), with commandline tools or within
69 Say you want to add a NT4 ws to an NT domain (controlled by a samba/ldap
70 server). You give the domain administrator's login and password in the
71 appropriate ws settings, then the ws contacts the samba server, which checks
72 the credentials and use them as unix user to run the smbldap-tools (if I
73 remember). Giving 512 as a RID to a LDAP entry marks it as a domain admin
74 for Samba (thus Windows). Using nss_ldap, you also have an account with
78 Known BUGS and WORKAROUND used
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81 The 2.2.2 has at least a bug : rid/primaryGroupID are read as hex in LDAP,
82 but written as decimal. Fixed in CVS by reading as decimal. By default
83 smbldap-useradd.pl writes decimal to LDAP. Use -x to support the odd
86 The samba-2.2.4-ldapbindnotuid0.patch is not a perfect solution however
87 as the check is there because Samba store admin credentials to establish the
88 LDAP connection. The uid == 0 check was to ensure that a normal user could
89 not get write access to the LDAP backend. A more logical situation should be
90 done for 2.2.5 by checking if the user is a member of the domain admin group
91 (reported to Jerremy and Gerald 2002-05-28).