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Enable LDAP Authentication for your Ops Manager Project

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Ops Manager enables you to configure the Authentication Mechanisms that all clients, including the Ops Manager Agents, use to connect to your MongoDB deployments. You can enable multiple authentication mechanisms for each of your projects, but you must choose only one mechanism for the Agents.

MongoDB Enterprise supports proxying authentication requests to a Lightweight Directory Access Protocol (LDAP) service.

LDAP is only available on MongoDB Enterprise builds. If you have existing deployments running on a MongoDB Community build, you must upgrade them to MongoDB Enterprise before you can enable LDAP for your Ops Manager project.


MongoDB Enterprise supports simple and SASL binding to Lightweight Directory Access Protocol (LDAP) servers via saslauthd and operating system libraries:

  • MongoDB Enterprise for Linux can bind to an LDAP server either via saslauthd or, starting in MongoDB 3.4, through the operating system libraries.
  • Starting in MongoDB version 3.4, MongoDB Enterprise for Windows can bind to an LDAP server through the operating system libraries.

The LDAP Proxy Authentication and LDAP Authorization sections in the MongoDB manual provide more information about LDAP and MongoDB. Setting up LDAP and SASL is beyond the scope of this document.


This procedure describes how to configure and enable LDAP authentication when using Automation. If Ops Manager doesn’t manage Monitoring or Backup, you must manually configure them to use LDAP. To configure LDAP, see Configure MongoDB Agent for LDAP


If you want to reset Authentication and TLS settings for your project, first unmanage any MongoDB deployments that Ops Manager manages in your project.


Optional: Specify the TLS Settings.

Field Action
MongoDB Deployment Transport Layer Security (TLS) Toggle this slider to ON.
TLS CA File Path

The TLS Certificate Authority file is a .pem-format certificate file that contains the root certificate chain from the Certificate Authority. The MongoDB Agent uses this same Certificate Authority file to connect to every item in your deployment.


The encrypted private key for the .pem certificate file must be in PKCS #1 format. The MongoDB Agent doesn’t support the PKCS #8 format.

Type the file path to the TLS Certificate Authority file on every host running a MongoDB process:

  • Type the file path on all Linux hosts in the first box.
  • Type the file path on all Windows hosts in the second box.

This enables the net.tls.CAFile setting for the MongoDB processes in the project.

Click Validate to test that each host in your deployment has a TLS Certificate Authority at the paths you specified.

Client Certificate Mode

Select if client applications or MongoDB Agents must present a TLS certificate when connecting to a TLS-enabled MongoDB deployments. Each MongoDB deployment checks for certificates from these client hosts when they try to connect. If you choose to require the client TLS certificates, make sure they are valid.

Accepted values are:

Optional Every client may present a valid TLS certificate when connecting to MongoDB deployments. MongoDB Agents might use TLS certificates if you don’t set the mongod tlsMode to None.
Required Every MongoDB deployment in this project starts with TLS-encrypted network connections. All Agents must use TLS to connect to any MongoDB deployment.

Recommend Using TLS/SSL with LDAP

By default, LDAP traffic is sent as plain text. This means that credentials (username and password) are exposed to basic network threats like sniffers and replay. Use LDAPS (LDAP over TLS/SSL) to encrypt authentication. Many modern directory services, such as Active Directory, require encrypted connections.


Choose the authentication mechanism.

  1. In the MongoDB Agent Connections to Deployment section, select LDAP.

  2. Select the appropriate type of LDAP authentication.


    • If you are using LDAP authorization, you must select Native LDAP Authentication.
    • If you are not using LDAP authorization, you must add users to the $external database in your MongoDB deployment. For an example, see LDAP Authentication.

Configure the LDAP Authorization Settings. (Optional)


Starting with MongoDB 3.4, you can authenticate users using LDAP, Kerberos, or X.509 certificates without requiring local user documents in the $external database as long as you enable LDAP authorization first. When such a user successfully authenticates, MongoDB performs a query against the LDAP server to retrieve all groups which that LDAP user possesses and transforms those groups into their equivalent MongoDB roles.

Skip this step if you selected Saslauthd in the previous step.

If you selected Native LDAP Authentication, complete the following steps:

  1. Provide the following values:

    Setting Value
    Server URL Specify the hostname:port combination of one or more LDAP servers.
    Transport Security Select TLS to encrypt your LDAP queries. If you do not need to encrypt the LDAP queries, select None.
    Timeout (ms) Specify how long an authentication request should wait before timing out.
    Bind Method

    Select either SASL or Simple.


    If you choose the Simple bind method, select TLS from the Transport Security because the Simple bind method passes the password in plain text.

    SASL Mechanisms Specify which SASL authentication service MongoDB uses with the LDAP server.
    Query User (LDAP Bind DN) Specify the LDAP Distinguished Name to which MongoDB binds when connecting to the LDAP server.
    Query Password (LDAP Bind DN) Specify the password with which MongoDB binds when connecting to an LDAP server.
    LDAP User Cache Invalidation Interval (s) Specify how long MongoDB waits to flush the LDAP user cache. Defaults to 30 seconds.
    User to Distinguished Name Mapping Specify an array of JSON documents that provide the ordered transformation(s) MongoDB performs on the authenticated MongoDB usernames. MongoDB then matches the transformed username against the LDAP DNs.
    Validate LDAP Server Config

    Select ON to validate the LDAP server configuration or OFF to skip validation.

    If ON and the configuration is invalid, the MongoDB deployment will not start.

  2. In the LDAP Authorization section, enter values for the following fields:

    Setting Value
    LDAP Authorization Toggle to ON to enable LDAP authorization.
    Authorization Query Template Specify a template for an LDAP query URL to retrieve a list of LDAP groups for an LDAP user.
    User to Distinguished Name Mapping Specify an array of JSON documents that provide the ordered transformation(s) MongoDB performs on the authenticated MongoDB usernames. MongoDB then matches the transformed username against the LDAP DNs.

Configure the Agents to use LDAP to connect to your MongoDB deployment.


Ops Manager limits Agents to using one mechanism per deployment.

  1. Select the LDAP option from the Agent Auth Mechanism section.

  2. Provide credentials for the MongoDB Agent:

    Setting Value
    MongoDB Agent Username Enter the LDAP username.
    MongoDB Agent Password Enter the password for Agent’s LDAP Username.
    MongoDB Agent LDAP Group DN If you enabled LDAP Authorization, enter the DN of the group of which the MongoDB Agent user is a member.

Click Save Settings.


Click Review & Deploy to review your changes.


Click Confirm & Deploy to deploy your changes.

Otherwise, click Cancel and you can make additional changes.


Create MongoDB Roles for LDAP Groups. (Optional)

After enabling LDAP Authorization, you need to create custom MongoDB roles for each LDAP Group you specified for LDAP Authorization.