Federated Authentication is a Cloud Platform feature that enables you to register and integrate with an external Identity Provider (IdP). This ensures that your users need to authenticate using the IdP to access resources within a Cloud Platform organization. You can purchase Federated Authentication as an add-on to your Cloud Platform subscription, if it is not included in your plan.
How does Federated Authentication work?
Federated Authentication enforces additional authentication, provided by the customer’s IdP, to access protected resources within your Cloud Platform organization. Resources within a Cloud Platform organization include applications and associated environments, logging, crons, and organization management like teams and permissions. Federated Authentication uses a Service Provider (SP)-initiated authentication flow. In an SP-initiated flow, your user attempts to access a protected resource, such as environment, and is redirected to the external IdP to verify the identity. After the IdP verifies the user’s identity, the requested protected resource is provided.
All Cloud Platform users must have an Acquia account, including the users who will authenticate with an IdP through Federated Authentication. In addition, such users must have an account with their IdP. Acquia accounts belong to users and not the subscription holder because certain users, such as consultants, may work across different subscriptions and have access to multiple Cloud Platform organizations. Users are only required to authenticate with an IdP through Federated Authentication when they are attempting to access resources within a protected Cloud Platform organization.
IdP compatibility with Federated Authentication
To integrate with Cloud Platform, your IdP must support SP-initiated SAML using the Redirect-POST method. Cloud Platform redirects sign-in requests to your IdP through a GET request and your IdP responds with a POST request. Cloud Platform doesn’t support the IdPs authenticating with a POST-POST method or the IdPs that only support IdP-initiated SAML authentication flows.
Managing Cloud Platform users
Federated Authentication does not support SCIM, user provisioning, or user management. Federated Authentication does not map roles nor use the SAML attributes for user role permissions mapping. Each user must have an Acquia account, even when they have access to a Cloud Platform organization that is integrated with an IdP. Acquia user roles and permissions are managed through the Cloud Platform and not through the IdP. For more information on provisioning users, deprovisioning users, and managing Cloud Platform user permissions, see Managing users, teams, roles, and permissions.
Security information about Federated Authentication
Before integrating a Cloud Platform organization with an IdP, note the following security implications:
- Integrating with an IdP affects all users accessing the Cloud Platform organization, including partners or consultants who belong to a different company.
- Acquia employees can access your subscription even after you enable the Federated Authentication feature.
- Acquia Support can debug SSO configuration issues using information from the Cloud Platform and HAR files. However, Acquia Support can’t help with issues pertaining to a customer’s IdP.
- Deactivating a user in your IdP prevents the user from accessing protected resources within the Cloud Platform organization. However, this won’t deactivate Git or SSH access. To completely remove the user’s access, you must remove the user from any associated teams either manually or by using the Cloud Platform API v2. For more information, see Best practices for team member departures.
User experience
When Federated Authentication is enabled, users sign in using their Cloud Platform account credentials on the Cloud Platform login page. Users are redirected to authenticate with the IdP when attempting to access protected resources. This means that users must log in twice:
- Through the Cloud Platform login page
- When attempting to access protected resources
- Sign in to the Cloud Platform user interface.
Navigate to the Cloud Platform organization to access applications and their environments.
Authenticate with IdP. For example, Google.
Proceed with access to the Cloud Platform organization and its applications.
If Federated Authentication is enabled for an organization, the system displays a tag for the specific organization on the My Organizations page.
Additional information
- When Federated Authentication is enabled, the IdP manages access to restricted resources in the Cloud Platform user interface.
- All access token sessions are cached for up to 5 minutes. After expiry of the token session, Cloud Platform automatically re-authenticates with the IdP when you access a page that requires Federated Authentication.
- You manage session limits through your IdP. Federated Authentication requires a user to re-authenticate after expiry of the IdP session limit. For example, you can manage session limits in Okta with an App Sign-on Policy. For more information on session limits with Okta, see Okta documentation.
- A user who is not authenticated with the IdP must authenticate. On successful authentication, such a user is redirected to Cloud Platform and can access the protected resources.
- A user who is not authenticated with the IdP and is unable to authenticate (account is inactivated or credentials are lost) cannot access the protected resources on Cloud Platform and gets a
401 Unauthorized Accesserror response.