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 (DAG), our on-premises SSO product, layers Duo's strong authentication and flexible policy engine on top of Marketo logins using the Security Assertion Markup Language (SAML) 2.0 authentication standard. Duo Access Gateway acts as an identity provider (IdP), authenticating your users using existing on-premises or cloud-based directory credentials and prompting for two-factor authentication before permitting access to Marketo.
Duo Access Gateway is included in the Duo Beyond, Duo Access, and Duo MFA plans, which also include the ability to 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 Marketo. Duo checks the user, device, and network against an application's policy before allowing access to the application.
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|
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 attributes not already present to the list, separated by a comma.
After completing the initial DAG configuration steps, click Applications on the left side of the Duo Access Gateway admin console.
Scroll down the Applications page to the Metadata section. This is the information you need to provide to Marketo when configuring SSO. Click the Download Certificate link to obtain the token signing certificate (the downloaded file is named "dag.crt").
Add the Duo Access Gateway as a new single sign-on provider for Marketo.
Log on to Marketo as an administrative user and navigate to Admin → Integration → Single Sign-On. Click the Edit button next to SAML Settings.
When the Edit SAML Settings window appears change SAML Single Sign-On to Enabled.
Copy the Entity ID URL from the Duo Access Gateway admin console metadata display and paste it into the Marketo SSO Issuer ID field.
Copy the SSO URL information from the Duo Access Gateway admin console Metadata display and paste it into the Marketo Entity ID field.
Choose In Name identifier element of Subject for the User ID Location option.
The "Identity Provider Certificate" is the DAG Metadata certificate supplied by Duo Access Gateway. Click Browse... to select the dag.crt file you downloaded from the DAG admin console "Application" page earlier.
After you've entered all the required information click Save.
On the SSO Settings page click Edit next to Redirect Pages.
When the Redirect Pages window appears copy the Logout URL information from the Duo Access Gateway admin console Metadata display and paste it into the Marketo Logout URL field.
Copy the Error URL information from the Duo Access Gateway admin console Metadata display and paste it into the Marketo Error URL field.
After you've entered all the required information click Save.
You can force users to sign in with SSO by navigating to Admin → Login Settings. Click Edit next to Security Settings. Click Advanced and check the box next to Require SSO. Click Save.
Learn more about Marketo SSO at the Marketo Docs Site.
Log on to the Duo Admin Panel and navigate to Applications.
Click Protect an Application and locate the entry for Marketo with a protection type of "2FA with SSO self-hosted (Duo Access Gateway)" in the applications list. Click Protect to the far-right to start configuring Marketo. See Protecting Applications for more information about protecting applications in Duo and additional application options.
Find your Marketo Munchkin Account ID under Admin → Integration → Munchkin. It will be located under Tracking Code, an example is 012-ABC-345. Copy this into the Munchkin Account ID field (dashes included) in the Duo Admin Panel.
Marketo 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||Azure|
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.
Click Save Configuration when done.
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.
Click the Download your configuration file link to obtain the Marketo 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!
Before you do this, verify that you updated the "Attributes" list for your Duo Access Gateway authentication source as specified here.
Return to the Applications page of the DAG admin console session.
Click the Choose File button in the "Add Application" section of the page and locate the Marketo SAML application JSON file you downloaded from the Duo Admin Panel earlier. Click the Upload button after selecting the JSON configuration file.
The Marketo SAML application is added.
You can log on to Marketo with IdP-initiated SSO via Duo Access Gateway using the Login URL provided by the DAG server when you created the Marketo application in the DAG admin console (https://yourserver.example.com/dag/saml2/idp/SSOService.php?spentityid=http://saml.marketo.com/sp).
You will be directed to your configured Authentication Source login page. Login with your username and password, approve the prompt for Duo two-factor authentication, and then you are forwarded to the Marketo site.
Congratulations! Your Marketo users now authenticate using Duo Access Gateway.
If you plan to permit use of WebAuthn authentication methods (security keys, U2F tokens, or Touch ID), Duo recommends enabling hostname whitelisting for this application and any others that show the inline Duo Prompt before onboarding your end-users.
Marketo does not support SP-initiated SSO login at this time.
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. Deployment Guides for AD FS versions 2.1, and 3.0/4.0 are available from Microsoft.
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 Marketo. Learn more about configuring Marketo SSO with AD FS at the Marketo Docs Site.
After you have successfully configured and tested AD FS SSO login to Marketo 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 Marketo.
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.