Citrix Gateway SAML Integration with AuthPoint

Deployment Overview

This document describes how to set up multi-factor authentication (MFA) for Citrix Gateway with AuthPoint as an identity provider. Citrix Gateway must already be configured and deployed before you set up MFA with AuthPoint.

Citrix Gateway can be configured to support MFA in several modes. For this integration, we set up SAML with AuthPoint.

This integration was tested with NS11.1 57.11nc of Citrix Gateway.

Citrix Gateway SAML Authentication Data Flow with AuthPoint

AuthPoint communicates with various cloud-based services and service providers with the SAML protocol. This diagram shows the data flow of an MFA transaction for a Citrix Gateway.

Before You Begin

Before you begin these procedures, make sure that:

Configure Citrix Gateway

To start, you must download the metadata file and the certificate file from the Resources page in the AuthPoint management UI. Once you have those, you can configure Citrix Gateway.

From the WatchGuard Cloud web UI:

  1. From the navigation menu, select Configure > AuthPoint. If you have a Service Provider account, you must first pivot to your Subscriber view.
  2. Select Resources.
  3. Click Certificate.

  1. Next to AuthPoint certificate you will associate with your resource, click and select Download Metadata.

    We recommend that you choose the certificate with the latest expiration date.

    The AuthPoint metadata provides your resource, in this case Citrix Gateway, with information necessary to identify AuthPoint as a trusted identity provider.

  1. Log in to the Citrix Gateway admin interface as an administrator.
  2. Select the Configuration tab.
  3. Select Traffic Management > SSL > Certificates > CA Certificates.
  4. Click Install.

  1. In the Certificate-Key Pair Name text box, type an easily identifiable name.
  2. For Certificate File Name, click Choose File and upload the certificate file you downloaded from AuthPoint.
  3. Click Install.

  1. Select NetScaler Gateway > Policies > Authentication > SAML.
  2. Select the Servers tab.
  3. Click Add.

  1. Complete all fields. The values for Redirect URL and Single Logout URL (optional) can be found in AuthPoint metadata file.
  2. From the Signing Certificate Name, select the certificate that is signed to the virtual server.
  3. Select More.

  1. For Signature Algorithm, select RSA-SHA256.
  2. For Digest Method, select SHA256.
  3. Click Create.

  1. On the SAML page, select the Policies tab. Click Add.

  1. In the Name text box, type AuthPoint.
  2. From the Server drop-down list, select your SAML server.
  3. From the Saved Policy Expressions drop-down list, select ns_true.
  4. Click Create.

  1. Select NetScaler Gateway > Virtual Server.
  2. Select your server.

  1. In the Basic Authentication section, click +.

  1. From the Choose Policy drop-down list, select SAML. Click Continue.

  1. In the Policy Binding section, click >.
  2. Select your SAML policy. Click OK.
  3. In the Priority text box, type 100.
  4. Click Bind.

  1. On the VPN Virtual Server configuration page, click Done.

Configure AuthPoint

Before AuthPoint can receive authentication requests from Citrix Gateway, you must specify the Citrix Gateway client as a SAML resource in AuthPoint. You must also assign the Citrix Gateway resource to the user group that will authenticate through Citrix Gateway.

Add a SAML Resource in AuthPoint

From the AuthPoint management UI:

  1. From the navigation menu, select Resources.
  2. From the Choose a Resource Type drop-down list, select SAML. Click Add Resource.

  1. Open a new page to Gateway, navigate to NetScaler Gateway > Policies > Authentication > SAML, click the Servers tab, select your SAML server, and then click Generate Metadata.
  2. Type your FQDN to reach Gateway, and select http or https. Click Continue to see a page with the metadata.
  3. Find canthe entityID and Assertion Consumer Service on the metadata page.
  4. In the AuthPoint management UI, in the Service Provider Entity ID text box, type or paste the entityID value from the Gateway matadata page.
  5. In the Assertion Consumer Service text box, type or paste the ACS value from the Gateway matadata page.
  6. Click Save.

Add an Access Policy to AuthPoint

You must have at least one user group in AuthPoint for authentication with Citrix Gateway, and you must assign an access policy for the Citrix Gateway resource to that group. If you already have a group, you do not have to add another group.

In the AuthPoint management UI:

  1. From the navigation menu, select Groups.
  2. To add a new group, click Add Group. If you already have a group that you want to use, select the group to edit it.

  1. In the Name text box, type a descriptive name for the group.
  2. (Optional) In the Description text box, type a description of the group.

  1. In the Access Policy section, click Add Policy.

  1. In the Add Policy dialog box, from the Resource drop-down list, select the resource you want to add an access policy for.
  2. (Optional) To require that users type their password before they authenticate for this resource, enable the Require Password Authentication toggle.
  3. Select the authentication options that users in this group can select from when they authenticate.

    For SAML resources, if you select more than one authentication option, users must select one of the available options when they authenticate. For example, if you select OTP and Push, users can choose to type their OTP or approve a push to authenticate. You cannot require that they do both.

  1. Click Add.

  1. (Optional) Add one or more safe locations to your group. For more information about safe locations and detailed instructions to add them, see About Safe Locations.
  2. Click Save.

Before you assign users to a group, you must add the users to AuthPoint. You can manually add user accounts or import user accounts from an external user database. For more information on how to add user accounts, see Add User Accounts.

Test the Integration

To test the integration of AuthPoint and the configuration of Citrix Gateway, you can authenticate with a mobile token on your mobile device. You can choose any method (one-time password, QR code, or push).

In this example, we show the push authentication method (users receive a push notification in the mobile app that they must approve to authenticate).

  1. In a web browser, go to the Citrix Gateway virtual server URL.
  2. Type your email address or AuthPoint user name. Click Next.
  3. If required, in the Password text box, type your password.
  4. For the authentication method, select Push.
  5. Click Send.
  6. Approve the authentication request that is sent to your mobile device.
    You are logged in to Citrix Gateway.