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 NS13.0: Build 52.24.nc 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.

Diagram that shows the data flow of an MFA transaction for a SAML resource with the push authentication method.

Before You Begin

Before you begin these procedures, make sure that:

You can bind Citrix Gateway with other Citrix products. In this integration guide, we bind XenApp and XenDesktop.

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 ,select Download Metadata and Download Certificate. 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. Navigate to Traffic Management > SSL > Certificates > CA Certificates.

Screen shot of the CA Certificates

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

Screen shot of the CA Certificates

  1. Select Citrix Gateway > Policies > Authentication > SAML.
  2. Select the Servers tab.
  3. Click Add.
  4. In the Name text box, type an easily identifiable name. In our example, we type AuthPoint.
  5. Clear the Import Metadata check box.
  6. In the Redirect URL text box, type the SingleSignOnService Location value from the AuthPoint metadata file.
  7. In the Single Logout URL text box, type the SingleLogoutService Location value from the AuthPoint metadata file.
  8. From the SAML Binding drop-down list, select POST.
  9. From the Logout Binding drop-down list, select POST.
  10. From the IDP Certificate Name drop-down list, select the certificate you uploaded from AuthPoint.
  11. In the User Field text box, type Name ID.
  12. From the Signing Certificate Name drop-down list, select the certificate that you installed when you integrate with XenApp and XenDesktop.
  13. In the Issuer Name text box, type the name used to log in to the Citrix Gateway Virtual Server.
  14. From the Reject Unsigned Assertion drop-down list, select ON.
  15. For Signature Algorithm, select RSA-SHA256.
  16. For Digest Method, select SHA256.

Screen shot of the creat authentication SAML server

  1. Click Create.

Screen shot of the creat authentication SAML server

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

Screen shot of the creat authentication SAML Policies

  1. In the Name text box, type an easily identifiable name. In our example, we type AuthPoint_Policy.
  2. From the Server drop-down list, select your SAML server.
  3. Under Expression, from the second Select drop-down list, select ns_true.

Screen shot of the creat authentication SAML Policies

  1. Click Create.

Screen shot of the creat authentication SAML Policies

  1. Navigate to Citrix Gateway > Virtual Servers.
  2. Select your Virtual Server.
  3. In the Basic Authentication section, unbind the exist LDAP Policy.
  4. Click +.
  5. From the Choose Policy drop-down list, select SAML.
  6. From the Choose Type drop-down list, select Primary.

Screen shot of the add authentication type

  1. Click Continue.

Screen shot of the add authentication type

  1. In the Select Policy section, click >.

Screen shot of the add authentication type

  1. Select your SAML policy. Click Select.
  2. Leave the default settings.

Screen shot of the add authentication type

  1. Click Bind.

Screen shot of the add authentication type

  1. On the VPN Virtual Server configuration page, click Done.
  2. Navigate to Citrix Gateway > Policies > Authentication > SAML.
  3. Select the Servers tab.
  4. Select your SAML server and then click Export SAML Metadata.
  5. Select your VPN server and click Export.
  6. On the metadata page, find and copy the entityID, Assertion Consumer Service and SingleLogoutService values. You need these values to create a SAML resource in AuthPoint.

Configure AuthPoint

Before AuthPoint can receive authentication requests from Citrix Gateway, you must add a SAML resource in AuthPoint. You must also create an authentication policy for the Citrix Gateway resource to determine which users can authenticate and log in to Citrix Gateway and which authentication methods they can use (Push, QR code, and OTP).

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. On the SAML page, in the Name text box, type a name for this resource.
  2. From the Application Type drop-down list, select Citrix Gateway.
  3. In the Service Provider Entity ID text box, type the entityID value from the Citrix Gateway matadata page.
  4. In the Assertion Consumer Service text box, type the Assertion Consumer Service value from the Citrix Gateway matadata page. Format https://Citrix Gateway FQDN/cgi/samlauth.
  5. From the User ID sent on redirection to service provider drop-down list, select User Name.
  6. In the Logout URL text box, type the Assertion Consumer Service value from the Citrix Gateway matadata page. Format https://Citrix Gateway FQDN/cgi/tmlogout.
  7. From the Signature Method drop-down list, select SHA-256.
  8. From the AuthPoint Certificate drop-down list, select the certificate to associate with your resource. This must be the same certificate that you downloaded the metadata for in the previous section.

  1. Click Save.

Add a Group in AuthPoint

You must have at least one user group in AuthPoint to configure MFA. If you already have a group, you do not have to add another group.

To add a group to AuthPoint:

  1. From the navigation menu, select Groups.
  2. Click Add Group.
    The New Group page appears.

Screenshot that shows the Groups page.

  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.

Screen shot of the New Group page.

  1. Click Save.
    Your group is listed on the Groups page.

Screenshot of the Save button on the New Group page.

Add an Authentication Policy to AuthPoint

Authentication policies specify which resources users can authenticate to and which authentication methods they can use (Push, QR code, and OTP).

You must have at least one authentication policy in AuthPoint that includes the Citrix Gateway resource. If you already have authentication policies, you do not have to create a new authentication policy. You can add this resource to your existing authentication policies.

Users that do not have an authentication policy for a specific resource cannot authenticate to log in to that resource.

To configure an authentication policy:

  1. From the navigation menu, select Authentication Policies.
  2. Click Add Policy.

Screenshot of the Add Policy button on the Authentication Policies page.

  1. Type a name for this policy.
  2. From the Select the authentication options drop-down list, select Authentication options and select which authentication options users can choose 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. Select which groups this policy applies to. You can select more than one group. To configure this policy to apply to all groups, select All Groups.
  2. Select the resource that you created in the previous section. If you want this policy to apply to additional resources, select each resource this policy applies to. To configure this policy to apply to all resources, select All Resources.

Screenshot of the Add Policy page with the groups and resources selected

  1. (Optional) If you have configured policy objects such as a Network Location, select which policy objects apply to this policy. When you add a policy object to a policy, the policy only applies to user authentications that match the conditions of the policy objects. For example, if you add a Network Location to a policy, the policy only applies to user authentications that come from that Network Location. Users who only have a policy that includes a Network Location do not get access to the resource when they authenticate outside of that Network Location (because they do not have a policy that applies, not because authentication is denied).

    If you configure policy objects, we recommend that you create a second policy for the same groups and resources without the policy objects. The policy with the policy objects should have a higher priority.

Screenshot of the Policy Objects drop-down list.

  1. Click Save.
    Your policy is created and added to the end of the policy list.

    When you create a new policy, we recommend that you review the order of your policies. AuthPoint always adds new policies to the end of the policy list.

Screenshot of the Save button on the Add Policy page.

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 login URL.
    You see the AuthPoint authentication page.
  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 Send Push.
  5. Approve the authentication request that is sent to your mobile device.
    You are logged in to Citrix Gateway virtual server.