# Setting up the Keycloak IAM server

Set up the Keycloak IAM server to secure the Pentaho Data Mastering application with the Single Sign On (SSO) authentication method. You can either install the default Keycloak IAM server or you can configure the Docker container to use an existing Keycloak IAM server.

**Important:** Components for Pentaho Data Mastering must be installed in the following order:

1. OpenObserver APM tool components
2. Keycloak IAM server components
3. Pentaho Data Mastering server components

If you have intalled a component out of order, uninstall that component and then install the components in order.

Complete the steps in one of the following procedures to set up the Keycloak IAM server:

* [Install the default Keycloak IAM server](/pentaho-data-mastering/installing-pentaho-data-mastering/setting-up-the-keycloak-iam-server/install-the-default-keycloak-iam-server.md)
* [Set up an existing Keycloak IAM server](/pentaho-data-mastering/installing-pentaho-data-mastering/setting-up-the-keycloak-iam-server/set-up-an-existing-keycloak-iam-server.md)


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