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Use identity federation

Contributors netapp-lhalbert
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Using identity federation makes setting up groups and users faster, and it allows users to sign in to StorageGRID using familiar credentials.

Configure identity federation for Grid Manager

You can configure identity federation in the Grid Manager if you want admin groups and users to be managed in another system such as Active Directory, Azure Active Directory (Azure AD), OpenLDAP, or Oracle Directory Server.

Before you begin
About this task

You can configure an identity source for the Grid Manager if you want to import groups from another system such as Active Directory, Azure AD, OpenLDAP, or Oracle Directory Server. You can import the following types of groups:

  • Admin groups. The users in admin groups can sign in to the Grid Manager and perform tasks, based on the management permissions assigned to the group.

  • Tenant user groups for tenants that don't use their own identity source. Users in tenant groups can sign in to the Tenant Manager and perform tasks, based on the permissions assigned to the group in the Tenant Manager. See Create tenant account and Use a tenant account for details.

Enter the configuration

Steps

  1. Select CONFIGURATION > Access control > Identity federation.

  2. Select Enable identity federation.

  3. In the LDAP service type section, select the type of LDAP service you want to configure.

    Identity Federation page showing LDAP service type options

    Select Other to configure values for an LDAP server that uses Oracle Directory Server.

  4. If you selected Other, complete the fields in the LDAP Attributes section. Otherwise, go to the next step.

    • User Unique Name: The name of the attribute that contains the unique identifier of an LDAP user. This attribute is equivalent to sAMAccountName for Active Directory and uid for OpenLDAP. If you are configuring Oracle Directory Server, enter uid.

    • User UUID: The name of the attribute that contains the permanent unique identifier of an LDAP user. This attribute is equivalent to objectGUID for Active Directory and entryUUID for OpenLDAP. If you are configuring Oracle Directory Server, enter nsuniqueid. Each user's value for the specified attribute must be a 32-digit hexadecimal number in either 16-byte or string format, where hyphens are ignored.

    • Group Unique Name: The name of the attribute that contains the unique identifier of an LDAP group. This attribute is equivalent to sAMAccountName for Active Directory and cn for OpenLDAP. If you are configuring Oracle Directory Server, enter cn.

    • Group UUID: The name of the attribute that contains the permanent unique identifier of an LDAP group. This attribute is equivalent to objectGUID for Active Directory and entryUUID for OpenLDAP. If you are configuring Oracle Directory Server, enter nsuniqueid. Each group's value for the specified attribute must be a 32-digit hexadecimal number in either 16-byte or string format, where hyphens are ignored.

  5. For all LDAP service types, enter the required LDAP server and network connection information in the Configure LDAP server section.

    • Hostname: The fully qualified domain name (FQDN) or IP address of the LDAP server.

    • Port: The port used to connect to the LDAP server.

      Note The default port for STARTTLS is 389, and the default port for LDAPS is 636. However, you can use any port as long as your firewall is configured correctly.

    • Username: The full path of the distinguished name (DN) for the user that will connect to the LDAP server.

      For Active Directory, you can also specify the Down-Level Logon Name or the User Principal Name.

      The specified user must have permission to list groups and users and to access the following attributes:

      • sAMAccountName or uid

      • objectGUID, entryUUID, or nsuniqueid

      • cn

      • memberOf or isMemberOf

      • Active Directory: objectSid, primaryGroupID, userAccountControl, and userPrincipalName

      • Azure: accountEnabled and userPrincipalName

    • Password: The password associated with the username.

      Note If you change the password in the future, you must update it on this page.

    • Group Base DN: The full path of the distinguished name (DN) for an LDAP subtree you want to search for groups. In the Active Directory example (below), all groups whose Distinguished Name is relative to the base DN (DC=storagegrid,DC=example,DC=com) can be used as federated groups.

      Note The Group unique name values must be unique within the Group Base DN they belong to.

    • User Base DN: The full path of the distinguished name (DN) of an LDAP subtree you want to search for users.

      Note The User unique name values must be unique within the User Base DN they belong to.

    • Bind username format (optional): The default username pattern StorageGRID should use if the pattern can't be determined automatically.

      Providing Bind username format is recommended because it can allow users to sign in if StorageGRID is unable to bind with the service account.

      Enter one of these patterns:

      • UserPrincipalName pattern (Active Directory and Azure): [USERNAME]@example.com

      • Down-level logon name pattern (Active Directory and Azure): example\[USERNAME]

      • Distinguished name pattern: CN=[USERNAME],CN=Users,DC=example,DC=com

        Include [USERNAME] exactly as written.

  6. In the Transport Layer Security (TLS) section, select a security setting.

    • Use STARTTLS: Use STARTTLS to secure communications with the LDAP server. This is the recommended option for Active Directory, OpenLDAP, or Other, but this option is not supported for Azure.

    • Use LDAPS: The LDAPS (LDAP over SSL) option uses TLS to establish a connection to the LDAP server. You must select this option for Azure.

    • Do not use TLS: The network traffic between the StorageGRID system and the LDAP server will not be secured. This option is not supported for Azure.

      Note Using the Do not use TLS option is not supported if your Active Directory server enforces LDAP signing. You must use STARTTLS or LDAPS.

  7. If you selected STARTTLS or LDAPS, choose the certificate used to secure the connection.

    • Use operating system CA certificate: Use the default Grid CA certificate installed on the operating system to secure connections.

    • Use custom CA certificate: Use a custom security certificate.

      If you select this setting, copy and paste the custom security certificate into the CA certificate text box.

Test the connection and save the configuration

After entering all values, you must test the connection before you can save the configuration. StorageGRID verifies the connection settings for the LDAP server and the bind username format, if you provided one.

Steps

  1. Select Test connection.

  2. If you did not provide a bind username format:

    • A "Test connection successful" message appears if the connection settings are valid. Select Save to save the configuration.

    • A "test connection could not be established" message appears if the connection settings are invalid. Select Close. Then, resolve any issues and test the connection again.

  3. If you provided a bind username format, enter the username and password of a valid federated user.

    For example, enter your own username and password. Don't include any special characters in the username, such as @ or /.

    Identity federation prompt to validate bind username format

    • A "Test connection successful" message appears if the connection settings are valid. Select Save to save the configuration.

    • An error message appears if the connection settings, bind username format, or test username and password are invalid. Resolve any issues and test the connection again.

Force synchronization with the identity source

The StorageGRID system periodically synchronizes federated groups and users from the identity source. You can force synchronization to start if you want to enable or restrict user permissions as quickly as possible.

Steps

  1. Go to the Identity federation page.

  2. Select Sync server at the top of the page.

    The synchronization process might take some time depending on your environment.

    Note The Identity federation synchronization failure alert is triggered if there is an issue synchronizing federated groups and users from the identity source.

Disable identity federation

You can temporarily or permanently disable identity federation for groups and users. When identity federation is disabled, there is no communication between StorageGRID and the identity source. However, any settings you have configured are retained, allowing you to easily reenable identity federation in the future.

About this task

Before you disable identity federation, you should be aware of the following:

  • Federated users will be unable to sign in.

  • Federated users who are currently signed in will retain access to the StorageGRID system until their session expires, but they will be unable to sign in after their session expires.

  • Synchronization between the StorageGRID system and the identity source will not occur, and alerts or alarms will not be raised for accounts that have not been synchronized.

  • The Enable identity federation checkbox is disabled if single sign-on (SSO) is set to Enabled or Sandbox Mode. The SSO Status on the Single Sign-on page must be Disabled before you can disable identity federation. See Disable single sign-on.

Steps

  1. Go to the Identity federation page.

  2. Uncheck the Enable identity federation checkbox.

Guidelines for configuring an OpenLDAP server

If you want to use an OpenLDAP server for identity federation, you must configure specific settings on the OpenLDAP server.

Caution For identity sources that aren't ActiveDirectory or Azure, StorageGRID will not automatically block S3 access to users who are disabled externally. To block S3 access, delete any S3 keys for the user or remove the user from all groups.

Memberof and refint overlays

The memberof and refint overlays should be enabled. For more information, see the instructions for reverse group membership maintenance in the OpenLDAP documentation: Version 2.4 Administrator's Guide.

Indexing

You must configure the following OpenLDAP attributes with the specified index keywords:

  • olcDbIndex: objectClass eq

  • olcDbIndex: uid eq,pres,sub

  • olcDbIndex: cn eq,pres,sub

  • olcDbIndex: entryUUID eq

In addition, ensure the fields mentioned in the help for Username are indexed for optimal performance.

See the information about reverse group membership maintenance in the OpenLDAP documentation: Version 2.4 Administrator's Guide.