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Configure User Authentication and Authorization with OneLogin VLDAP

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Feature unavailable in Free and Shared-Tier Clusters

This feature is not available for M0 (Free Tier), M2, and M5 clusters. To learn more about which features are unavailable, see Atlas M0 (Free Tier), M2, and M5 Limitations.

This guide shows you how to enable Atlas to authenticate and authorize database users (not Atlas users) from OneLogin, a third-party LDAP provider.

You can enable LDAP authentication only or you can enable both LDAP authentication and authorization:

  • If you enable LDAP authentication only, you add individual users to Atlas and assign database access privileges to each user you add.
  • If you enable LDAP authentication and authorization, you add user groups to Atlas and assign database access privileges to each group. Users inherit the database access privileges from the LDAP group they belong to.

Atlas supports authenticating and authorizing database users from OneLogin.

  • You must deploy M10 or larger Atlas clusters to enable LDAP integration. LDAP integration is an Atlas Enterprise feature.
  • Atlas does not support authenticating and authorizing users synchronized from existing LDAP directories.
  • Atlas does not support single sign-on integration for database users. To learn about single-sign on integration for the Atlas administrative web interface, see Configure Federated Authentication.

The following procedure configures OneLogin for authentication with Atlas:

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  1. To learn more about setting up the OneLogin LDAP service, see the OneLogin documentation.

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    You may need to contact OneLogin support to enable the VLDAP service for your account.

  2. Note your <onelogin-instance-id>. You must provide it in several places during the configuration process.

    The instance name is located in the URL you use to sign in to your OneLogin account:

    https://<onelogin-instance-id>.onelogin.com
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In OneLogin, click Authentication, then click VLDAP. Add the following to the Allow access by IP address field to add them to the IP access list:

  1. The IP address of each node in your Atlas cluster. Use nslookup to get the IP address of each host in your cluster, using hostnames that Atlas generates:

    nslookup cluster0-shard-00-00-example.mongodb.net
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    If the IP addresses of any of your nodes change, you must update the IP access list with the new IP addresses.

  2. (Optional) The IP address of a machine you can run ldapsearch commands from to troubleshoot LDAP connection issues.
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  1. Create a new OneLogin user to use as the Atlas bind user. The bind user is a OneLogin user that you use to query the account and to authenticate database users' credentials when they connect to an Atlas database.

    The Email and Username fields are required when you create the bind user. You should enter the same email address in both of these fields.

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    Don't use your own user account for the bind user.
  2. Use the following template to determine the full Distinguished Name (DN) of your bind user:

    cn=<bind-user-email>,ou=users,dc=<onelogin-instance-id>,dc=onelogin,dc=com

    For example, if your <bind-user-email> is bind@example.com and your <onelogin-instance-id> is mdb-example, your bind user's DN is:

    cn=bind@example.com,ou=users,dc=mdb-example,dc=onelogin,dc=com
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In OneLogin, assign the bind user the Manage users, Manage group, or Super user privilege.

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If you grant the bind user the Manage group privilege, you must select a group. Atlas can only authenticate and authorize LDAP users who belong to this group.

  1. Navigate to your OneLogin Users page.
  2. Click the bind user.
  3. Click Add Privilege.
  4. Select the privilege you want to grant the user, then click Continue.
  5. Click Save User.
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If you have not done so already, set a password for the bind user in OneLogin:

  1. Click More Actions, then click Change Password.
  2. Enter a password, then click Update.
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If they don't exist already, create users in OneLogin that you want to grant database access to:

  1. Navigate to your OneLogin users page.
  2. Click New User.
  3. Enter the user's details.

    The Email and Username fields are required when you create database users. Enter the same email address in both of these fields.

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    Avoid entering email addresses with plus symbols (+). The Atlas LDAP integration may encounter issues with email addresses containing plus symbols.

  4. Click Save User.
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If you have not done so already, set a password for each database user in OneLogin:

  1. Navigate to your OneLogin users page.
  2. Click the user you want to set a password for.
  3. Click More Actions, then click Change Password.
  4. Enter a password, then click Update.

The following procedure enables Atlas to authenticate database users from OneLogin LDAP :

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  1. If it is not already displayed, select the organization that contains your desired project from the Organizations menu in the navigation bar.
  2. If it is not already displayed, select your desired project from the Projects menu in the navigation bar.
  3. Click Advanced in the sidebar.
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You might incur additional costs when you enable this feature. See Advanced Security.

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  • Server Hostname:

    ldap.us.onelogin.com
  • Server Port: 636
  • Bind Username:

    cn=<bind-user-email>,ou=users,dc=<onelogin-instance-id>,dc=onelogin,dc=com
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Add a User to DN mapping similar to the following example to allow clients to provide their email addresses instead of full DNs when they connect to Atlas databases:

[
{
"match": "(.+)",
"substitution": "cn={0},ou=users,dc=<onelogin_instance_id>,dc=onelogin,dc=com"
}
]
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You may provide a self-signed certificate.

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Wait for Atlas to deploy your changes. Atlas verifies that your clusters can connect to, authenticate with, and query your LDAP server using the configuration details that you provide.

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Skip this step if you want to enable LDAP authorization.

Add users managed in the OneLogin LDAP to Atlas.

  1. In the Security section of the left navigation, click Database Access.
  2. Click Add New Database User.
  3. Click LDAP User.
  4. Perform one of the following:

    1. If you have not entered a User to DN Mapping, enter the full DN of the LDAP user. Follow this template:

      cn=<user-name>,ou=users,dc=<onelogin-instance-id>,dc=onelogin,dc=com

      For example, if your <user-name> is jane@example.com and your <onelogin-instance-id> is mdb-example, your bind user's DN is:

      cn=jane@example.com,ou=users,dc=mdb-example,dc=onelogin,dc=com
    2. If you entered a User to DN Mapping, enter the username or email address that your mapping requires.
  5. Select the database access level to grant to the user.
  6. Click Add User.
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Skip this section if you don't want to enable LDAP authorization.

The following procedure configures Atlas to authorize users who belong to OneLogin LDAP database access groups.

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  • You must enable authentication with LDAP before enabling authorization.
  • When you enable and configure LDAP authorization, database users who are only configured for LDAP authentication will no longer be able to access databases.
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Atlas LDAP authorization uses LDAP groups to determine if users are authorized to perform database actions.

Create separate OneLogin groups for each level of access that you want to grant to users. For example, you create one group for read access to one database, another for read and write access, and so on.

  1. Navigate to your OneLogin groups page.
  2. Click New Group.
  3. Enter a group name, for example db-read.
  4. Click Save.
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Assign users to groups based on the level of access each user requires.

  1. Navigate to your OneLogin Users page.
  2. Click the user you want to add to a group.
  3. Click the Authentication tab.
  4. Select the group you want to add the user to.
  5. Click Save User.
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Skip this section if you don't want to enable LDAP authorization.

The following procedure adds the OneLogin database access groups to Atlas and enables database user authorization in Atlas:

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Add each of the OneLogin database groups you created to Atlas. Members of groups that you add are authorized to perform database actions granted to the group.

  1. In the Security section of the left navigation, click Database Access.
  2. Click Add New Database User.
  1. Click LDAP Group, and then enter the full DN of the group containing your database users, even if you enabled User to DN Mapping. Follow this template:

    cn=<group-name>,ou=groups,dc=<onelogin-instance-id>,dc=onelogin,dc=com

    For example, if your <group-name> is db-read and your <onelogin-instance-id> is mdb-example, your bind user's DN is:

    cn=db-read,ou=groups,dc=mdb-example,dc=onelogin,dc=com
  1. Select the database access level to grant to users in this group.
  2. Click Add User.
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  1. If it is not already displayed, select the organization that contains your desired project from the Organizations menu in the navigation bar.
  2. If it is not already displayed, select your desired project from the Projects menu in the navigation bar.
  3. Click Advanced in the sidebar.
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When a user attempts to perform an action, Atlas executes the LDAP query template to obtain the LDAP groups to which the authenticated user belongs. Atlas permits the action if the query returns at least one group that is authorized to perform the action. Atlas does not permit the action if the query returns no groups that are authorized to perform the action.

Atlas substitutes the authenticated username in the {USER} placeholder when it runs the query. The query is relative to the host specified in Server Hostname.

The formatting for the query must conform to RFC4515 and RFC 4516.

Enter the following Query Template:

{USER}?memberOf?base
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Other query templates may also work.

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Wait for Atlas to deploy your changes. Atlas verifies that your clusters can connect to, authenticate with, and query your LDAP server using the configuration details that you provide.

The following procedure verifies that LDAP authentication (and LDAP authorization, if enabled) is configured correctly:

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When LDAP authentication is enabled, database users must override the following parameters in the connection string for their clients:

  • authSource must be $external
  • authenticationMechanism must be PLAIN
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To copy the connection string:

  1. Click Connect on the Clusters page.
  2. Click LDAP, and then click Copy.
  3. Paste and edit the string with your User DN and password.
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Connect to your cluster with a user's full DN if User to DN Mapping is not enabled.

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add the host from which you're running ldapsearch to your IP access list before you troubleshoot OneLogin connection issues.

Use ldapsearch to determine if the query template you configured Atlas to use returns user DNs the way you expect. The query template may not be returning the correct user DNs if LDAP authentication works but LDAP authorization doesn't.

Use the following ldapsearch template:

ldapsearch -H 'ldaps://ldap.us.onelogin.com:636' -D '<bind_user_dn>' -w '<bind_user_pwd>' -b 'dc=<onelogin_instance_id>,dc=onelogin,dc=com' -s sub

For example, if your bind-user-dn is cn=jane@example.com,ou=users,dc=mdb-example,dc=onelogin,dc=com and your <onelogin-instance-id> is mdb-example, use the following command:

ldapsearch -H 'ldaps://ldap.us.onelogin.com:636' -D 'cn=jane@example.com,ou=users,dc=mdb-example,dc=onelogin,dc=com' -w '<REDACTED>' -b 'dc=mdb-example,dc=onelogin,dc=com' -s sub
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Other query templates may also work.

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