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Duo Protection for Desk

Duo offers a variety of methods for adding two-factor authentication and flexible security policies to Desk SSO logins, complete with inline self-service enrollment and authentication prompt.

Overview

As business applications move from on-premises to cloud hosted solutions, users experience password fatigue due to disparate logons for different applications. Single sign-on (SSO) technologies seek to unify identities across systems and reduce the number of different credentials a user has to remember or input to gain access to resources.

While SSO is convenient for users, it presents new security challenges. If a user's primary password is compromised, attackers may be able to gain access to multiple resources. In addition, as sensitive information makes its way to cloud-hosted services it is even more important to secure access by implementing two-factor authentication.

Duo Access Gateway

Duo Access Gateway (DAG), our on-premises SSO product, layers Duo's strong authentication and flexible policy engine on top of Desk logins using the Security Assertion Markup Language (SAML) 2.0 authentication standard. Duo Access Gateway authenticates your users using existing on-premises or cloud-based directory credentials and prompts for two-factor authentication before permitting access to Desk.

Duo Access Gateway is part of the Duo Beyond and Duo Access plans, so you can define policies that enforce unique controls for each individual SSO application. For example, you can require that Salesforce users complete two-factor authentication at every login, but only once every seven days when accessing Desk. Duo checks the user, device, and network against an application's policy before allowing access to the application.

Deploy Duo Access Gateway

  1. Install Duo Access Gateway on a server in your DMZ. Follow our instructions for deploying the server, configuring DAG settings, and adding your primary authentication source.

  2. Add the attribute from the table below that corresponds to the Duo Mail attribute in the "Attributes" field when configuring your Active Directory or OpenLDAP authentication source in the DAG admin console. For example, if Active Directory is your authentication source, enter mail in the "Attributes" field.

    Duo Attribute Active Directory OpenLDAP
    Mail attribute mail mail

    If your organization uses another directory attribute than the ones listed here then enter that attribute name instead. If you've already configured the attributes list for another cloud service provider, append the additional attribute to the list, separated by a comma.

  3. After completing the initial DAG configuration steps, click Applications on the left side of the Duo Access Gateway admin console.

  4. Scroll down the Applications page to the Metadata section. This is the information you need to provide to Desk when configuring SSO.

    DAG Metadata Information

Enable Desk SSO

Add the Duo Access Gateway as a new single sign-on provider for Desk.

  1. Log on to your Desk Admin console (https://yourdomain.desk.com/admin) as an administrator and click the gear icon in the upper right-hand corner to access the "Settings" page.

  2. On the "Settings" page click the Single Sign-On link in the left-hand navigation menu.

  3. On the "Single Sign-On" page click the SAML SSO option. The page will expand with new options.

  4. In the Authentication Service Name field type Duo Access Gateway.

  5. Copy the SSO URL information from the Duo Access Gateway admin console Metadata display and paste it into the Desk Remote login URL field.

    Example: https://yourserver.example.com/dag/saml2/idp/SSOService.php

  6. Copy the Logout URL information from the Duo Access Gateway admin console Metadata display and paste it into the Desk Remote logout URL field.

    Example: https://yourserver.example.com/dag/saml2/idp/SingleLogoutService.php

  7. Copy the Fingerprint from the Duo Access Gateway admin console Metadata display and paste it into the Desk Certificate fingerprint field.

  8. Uncheck Also allow Desk Authentication to force users to log in with SSO.

  9. After you've entered all the required information click Save.

    Desk Single Sign-On Setting Edit

Learn more about Desk SSO at the Desk Support Center.

Create the Desk Application in Duo

  1. Log on to the Duo Admin Panel and navigate to Applications.

  2. Click Protect an Application, locate SAML - Desk in the applications list, and click Protect this Application. See Getting Started for help.

  3. Enter the subdomain used when creating your company's Desk account as the Subdomain. For example, if you chose yourdomain.desk.com when creating your Desk account then enter yourdomain.

  4. Enter the login URL used when logging into your company's Desk portal as the Login URL. For example, if your Desk login URL is https://yourdomain.desk.com/web/agent then enter yourdomain.desk.com.

    If your company has configured a custom CNAME for your Desk portal such as https://support.yourcompany.com/web/agent then enter support.yourcompany.com.

  5. Desk uses the Mail attribute when authenticating. We've mapped Mail attribute to DAG supported authentication source attributes as follows:

    Duo Attribute Active Directory OpenLDAP SAML IdP Google Azure
    Mail attribute mail mail mail email mail

    If you are using a non-standard email attribute for your authentication source, check the Custom attributes box and enter the name of the attribute you wish to use instead.

  6. Click Save Configuration to generate a downloadable configuration file.

    Duo Desk Application Settings

  7. You can adjust additional settings for your new SAML application at this time — like changing the application's name from the default value, enabling self-service, or assigning a group policy — or come back and change the application's policies and settings after you finish SSO setup. If you do update any settings, click the Save Changes button when done.

  8. Click the Download your configuration file link to obtain the Desk application settings (as a JSON file).

    Important: This file contains information that uniquely identifies this application to Duo. Secure this file as you would any other sensitive or password information. Don't share it with unauthorized individuals or email it to anyone under any circumstances!

Add the Desk Application to Duo Access Gateway

  1. Return to the Applications page of the DAG admin console session.

  2. Click the Choose File button in the "Add Application" section of the page and locate the Desk SAML application JSON file you downloaded from the Duo Admin Panel earlier. Click the Upload button after selecting the JSON configuration file.

  3. The Desk SAML application is added.

    Desk Application Added

Verify SSO

You can log on to Desk using your organization’s domain login page e.g. https://yourdomain.desk.com/web/agent. This redirects to the Duo Access Gateway login page. Enter your primary directory logon information, approve Duo two-factor authentication, and get redirected back to the Desk site after authenticating.

DAG Login and Authentication Prompt

If you are using the Desk mobile app, enter in your company's Desk portal URL and click Next. This will redirect to the Duo Access Gateway login page.

Congratulations! Your Desk users now authenticate using Duo Access Gateway.

Microsoft AD FS

Microsoft's Active Directory Federation Services (AD FS) is a popular choice for SSO because it easily integrates with the AD identity store many organizations already have deployed. Duo's support for cloud applications and SSO drops in to an existing AD FS installation to provide secondary authentication after a user passes primary authentication (successful Active Directory logon).

If you don't already have AD federation running the first step is to install and configure Microsoft AD FS in your organization. Microsoft's Deployment Guides for AD FS versions 2.0, 2.1, and 3.0 are available on the TechNet site.

Once your AD FS services are up and running, the second step is to configure the SSO partnership between your AD FS service and the external cloud resource, in this case Desk. Learn more about configuring Desk SSO with AD FS at the Desk Support Center site.

After you have successfully configured and tested AD FS SSO login to Desk using your AD domain credentials, you can then install the Duo AD FS integration. AD FS protection is included with Duo's paid plans.

With the Duo integration for AD FS installed, users pass primary authentication to the AD FS service as usual. Once primary authentication succeeds, users are forwarded to the Duo service for secondary authentication. After approving logon using one of Duo's authentication methods, the user is fully logged in to Desk.

Other Identity Partners

Using a third-party SSO provider for cloud application access? Duo partners with leading cloud SSO providers like Okta and OneLogin to secure access with our strong and flexible authentication platform.

You can also use Duo two-factor authentication with CAS and Shibboleth on-premises IdPs.

Troubleshooting

Need some help? Try searching our Knowledge Base articles or Community discussions. For further assistance, contact Support.

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