[PDF] Integrating OpenLDAP and Samba Active Directory in Univention





Previous PDF Next PDF



Integrating OpenLDAP and Samba Active Directory in Univention

24 ago 2017 2. OpenLDAP and Active Directory in Univention Corporate Server (UCS). 3. LDAP Synchronization. 4. Solved Challenges. 5. Future direction ...



Synchronize users with LDAP

Users synchronized with LDAP can log in to Creatio with their domain credentials. Creatio supports synchronization with Active Directory and OpenLDAP. The 



OpenLDAP directory integration with Cisco Unified Communications

x it is possible to synchronize the internal end-users database with an external LDAP directory. Natively



Directory Synchronization Tool Users Guide

The Trend Micro Email Security Directory Synchronization Tool is a directory connector supporting MicrosoftActive Directory Open LDAP



(Legacy) Directory Integration with Workspace ONE Access

service. Workspace ONE Access supports integration with Active Directory and with LDAP directories such as OpenLDAP. When you integrate a directory 



CUCM Configuration for LDAP

Sync Users from LDAP page 4. Enable LDAP Integration. Follow these steps to enable LDAP integration with Active Directory (AD) or OpenLDAP.



Directory Integration with VMware Identity Manager - VMware

Managing User Attributes that Sync from Active Directory 11 supports only those OpenLDAP implementations that support paged search queries.



VMware Docs

Workspace ONE Access supports integration with Active Directory and with LDAP directories such as OpenLDAP. When you integrate a directory a limited number 



Computer System Administration. Topic 2. Active Directory secure

Active directory secure service: LDAP (over SSL) openLDAP is a LDAPv3 protocol implementa*on for GNU: ... Disadvantages of LDAP Sync replica*on:.



Configuring Ambari Authentication with LDAP/AD

17 dic 2019 Generic Open LDAP setup example. ... configure LDAP or Active Directory (AD) external authentication



Synchronize users with LDAP - Creatio

In Creatio you can synchronize the organizational and functional user roles with the Active Directory groups You can transfer the company organizational structure and role settings from Active Directory to Creatio after the LDAP synchronization Set up the synchronization between Creatio organizational roles and Active Directory groups

  • Overview

    Lightweight Directory Access Protocol (LDAP) is a directory service protocol that runs on the TCP/IP stack. It provides a mechanism that you can use to connect to, search, and modify internet directories. Based on a client-server model, the LDAP directory service enables access to an existing directory.

  • When to use LDAP synchronization

    Use LDAP synchronization when you need to synchronize identity data between your on premises LDAP v3 directories and Azure AD as illustrated in the following diagram.

  • System components

    •Azure AD: Azure AD synchronizes identity information (users, groups) from organization's on-premises LDAP directories via Azure AD Connect.

  • Implement LDAP synchronization with Azure AD

    Explore the following resources to learn more about LDAP synchronization with Azure AD.

Is it possible to synchronise OpenLDAP with activedirectory (AD)?

Currently I have a OpenLDAP database used by all the services (emai, svn ..) and i would like to synchronise it with an ActiveDirectory (AD). I've done some research and i found that it could be done using 389DS (Open Source LDAP developed by Redhat) but to do so I have to migrate my own database to 389DS which I prefer not to do for the moment.

Can Azure AD replace LDAP synchronization with Azure AD Connect?

Azure Active Directory (Azure AD) can replace LDAP synchronization with Azure AD Connect. The Azure AD Connect synchronization service performs all operations related to synchronizing identity data between you're on premises environments and Azure AD.

What is Azure Active Directory authentication and synchronization protocol?

Azure Active Directory authentication and synchronization protocol overview describes integration with authentication and synchronization protocols. Authentication integrations enable you to use Azure AD and its security and management features with little or no changes to your applications that use legacy authentication methods.

What happened to SLURPD in OpenLDAP?

The old slurpdmechanism only operated in provider-initiated push mode. Slurpd replication was deprecated in favor of Syncrepl replication and has been completely removed from OpenLDAP 2.4. The slurpd daemon was the original replication mechanism inherited from UMich's LDAP and operated in push mode: the provider pushed changes to the replicas.

  • Past day

Integrating OpenLDAP and Samba Active

Directory in Univention Corporate Server

LDAPCon 2017

Arvid Requate

Univention GmbH

www.univention.comAgenda

1.Introduction: Whom I work for

2.OpenLDAP and Active Directory in Univention Corporate Server (UCS)

3.LDAP Synchronization

4.Solved Challenges

5.Future direction

3 www.univention.comUnivention GmbH »Producer of the enterprise Linux distribution Univention Corporate Server (UCS)

»Identity and Access Management

»Founded in 2002, oiÌifiÌices in Bremen, Berlin and Seattle

»45 employees

4 www.univention.comInstallation Footprints »One customer with 30M authentication / email accounts »One customer with 70k Samba / Active Directory accounts, not all users in generic groups like Domain Users »Another with 30k Samba / Active Directory accounts »Down to small to medium size business customers 5 www.univention.comUnivention Corporate Server (UCS)

»Debian based Linux distribution with

Microsoft-like domain concept,

100% open source (AGPL v3)

»Web-based management interface

»HTTP- and Python-API

»Main backend: OpenLDAP

»Samba Active Directory Services for

Microsoft Windows Clients & Servers

»A lot of third party services

6 www.univention.comUCS & Active Directory Services

»Active Directory Domain Control

and Services for Windows Clients

»LDAP Service with AD semantics

on port 389

»Obstacle I: Difffering LDAP Schemata

OpenLDAP vs Active Directory

»Obstacle II: Difffering LDAP server

implementations, metadata etc. 7 www.univention.comOpenLDAP Replication in UCS

»Single-master conifiguration

»Replication via custom "listener/notiifier"

mechanism (C + Python modules)

»Custom "translog" OpenLDAP overlay

a bit like the accesslog overlay

»Selective replication via ACLs

»Port 7389 / 7636 only

if Samba/AD is present 8 www.univention.comSamba 4 / Microsoft Active Directory Replication (DRS)

»Multi-master operation

»Replication between Domain Controllers

via Microsoft DRS protocol

»Full mesh or structured into "sites"

»Flexible Single Master Operation roles:

»Master for Account-IDs (RID pools)

»Schema master

»Not much support for selective replication

9 www.univention.comBridging the worlds: Univention S4 Connector

»Originally implemented to replicate user and

group objects between pre-existing native

Microsoft Active Directory (AD) Domains and

UCS / OpenLDAP

»Re-invented to synchronize Samba/AD with

OpenLDAP inside of a UCS domain controller

(including Kerberos hashes) 10 www.univention.comBridging the worlds: Univention S4 Connector Sync Service provided by single UCS Samba/AD DCOpenLDAPS4-

Connector-

DaemonWeb/

Python

API

ListenerSamba

Directory

LDAP-

InterfaceLDAPI

11 www.univention.comBridging the worlds: Univention S4 Connector »Single point of transition between single-master OpenLDAP and multi-master Samba / Active Directory »In specialized products (UCS@school) we use OpenLDAP as information bus between separate Active Directory Controllers, using OpenLDAP ACLs to implement selective replication 12 www.univention.comBridging the worlds: Univention S4 Connector S4 OLS4

OLOther UCS Hosts

OL UCS Listener/Notifier ReplicationActive Directory DRS Replication

UCS DC

MasterUCS DC

Slave 13 www.univention.comUpdate tracking: Active Directory

»Active Directory:

»State based replication, not difff based

»Each Domain Controller maintains

per change uSNChanged attribute (update sequence number) »per attribute version numbers, timestamps and USNs in replPropertyMetadata »plus Linked Value Replication (LVR), e.g. for member/memberOf:

»msDS-ReplValueMetaData

14 www.univention.comUpdate tracking: OpenLDAP

»OpenLDAP:

»per object entryCSN

»Optional: accesslog difffs (e.g. for delta-syncrepl)

»No attribute level metadata

»Some applications using OpenLDAP implement their own attribute timestamps

»shadowLastChange

»sambaPwdLastSet

»krb5KeyVersionNumber

15 www.univention.comUCS LDAP Replication »Univention speciific addon: Translog overlay for OpenLDAP: »Logging per change Notiifier-ID (like uSNChanged) »Listener process reacts on changes, calls Python modules for replication »Listener cache (LMDB, hurray!) - passes cached and current LDAP object state

»attribute level difff

»One of the consumer modules: "S4-Connector"

»S4-Connector translates schema diffferences, values, positions, ... »Difffs Samba/AD object against changed OpenLDAP attributes → ldapmodify Samba/AD 16 www.univention.comS4-Connector replication: ping pong »Bidirectional synchronization: Asynchronous polling of both sides »Notiifier-IDs change → Sync to Samba/AD »highestCommittedUSN change → Sync to OpenLDAP

»Eventual convergence

»Ok: Several "trivial" issues and corner cases to work around, like schema mapping, value marshalling, group membership replication, Deleted Objects 17 www.univention.comExample: S4-Connector replication concurrency conlflict

1) Windows Admin running GUI tool working on Samba/AD

2) Click → Write to Samba/AD

3) S4-Connector sync to OpenLDAP

4) Race condition:

» S4-Connector detects change in OpenLDAP

→ Sync back to Samba/AD

»User clicks again → Write to Samba/AD

18 www.univention.comFixing S4-Connector replication concurrency »Active Directory Replication (DRS) avoids this by Propagation Dampening »Each LDAP server maintains an "Up-to-dateness-vector" of uSNChanged values to avoid sending obsolete updates (attribute level ifiltering) »Workaround: The S4-Connector can track the entryCSN of own writes to OpenLDAP So we can ignore them on the way back to Samba/AD LDAP »Using Post-Read LDAP Control (RFC 4527) to avoid TOCTTOU issues »We use this and it helps a lot, but: OpenLDAP only 19 www.univention.comDirections: How to improve from here?

»Two complementary options:

1) Implement Post-Read LDAP Control (RFC 4527) for Samba/AD LDAP

»Probably we need to do this ifirst

2) More metadata detail → ifiner change granularity

»Object level → attribute level

»reduced conlflict surface

»decidability

20 www.univention.comOpenLDAP Metadata »Object level:dn: uid=user1,cn=users,dc=ar41i1,dc=qa entryUUID: ee0bf7d6-1d33-1037-9e97-3bb60a8becb2 createTimestamp: 20170824162046Z modifyTimestamp: 20170824162332Z creatorsName: cn=admin,dc=ar41i1,dc=qa modifiersName: cn=admin,dc=ar41i1,dc=qa entryCSN: 20170824162332.083696Z#000000#000#000000 21
www.univention.comActive Directory Metadata

»Object level →

»Attribute level → dn: CN=user1,CN=Users,DC=ar41i1,DC=qa objectGUID: 7f82f70c-1247-4846-bf49-a72447c704c1 whenCreated: 20170824162050.0Z whenChanged: 20170824162332.0Z uSNCreated: 3996 uSNChanged: 4002 replPropertyMetaData::

L/lTN+QK2LYeclOEzgoA8AAACcDwAAAAAAAA==

22
www.univention.comActive Directory Attribute Metadata Attribute level → dn: CN=user1,CN=Users,DC=ar41i1,DC=qa replPropertyMetaData: array: ARRAY(26) element(1): struct replPropertyMetaData1 Attid : DRSUAPI_ATTID_objectClass

Version : 0x00000001 (1)

originating_change_time : Thu Aug 24 18:20:50 2017 originating_invocation_id: ff8235ec-3395-407e-ad8b-61e725384ce0 originating_usn : 0x0000000000000f9c (3996) local_usn : 0x0000000000000a3f (2623) 23
www.univention.comAttribute level versioning in OpenLDAP? »Pro: enables attribute level state comparison between Samba/AD and OpenLDAP »Pro: provide basis for attribute level conlflict resolution in multi-master syncrepl setups »replPropertyMetaData attribute would be a precondition for DRS replication between

OpenLDAP and Samba/AD LDAP

»Example: contrib/slapd-modules/samba4/vernum.c for msDS-KeyVersionNumber www.univention.comQuestions? Feedback? www.univention.comThank you!

Thanks to the

OpenLDAP maintainers!

quotesdbs_dbs15.pdfusesText_21
[PDF] synchronisation d'annuaire active directory et de base ldap

[PDF] ldap synchronization connector

[PDF] cours active directory pdf gratuit

[PDF] active directory pdf windows server 2008

[PDF] cours active directory windows server 2008 pdf

[PDF] active directory francais

[PDF] cours active directory ppt

[PDF] installation et configuration windows server 2012 pdf

[PDF] guide de ladministrateur windows server 2012 pdf

[PDF] toutes les formules excel 2007

[PDF] astuces excel 2007 pdf

[PDF] excel astuces formules

[PDF] excel astuces avancées

[PDF] les formules de calculs et fonctions dexcel pdf

[PDF] 85 astuces pour microsoft excel pdf