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 OpenDNS 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 OpenDNS.
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 OpenDNS. Duo checks the user, device, and network against an application's policy before allowing access to the application.
Install Duo Access Gateway on a server in your DMZ. Follow our instructions for deploying the server, configuring DAG settings, and adding an Authentication Source.
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 OpenDNS when configuring SSO. Click the Download XML metadata link to obtain the DAG metadata file (the downloaded file is named "dag.xml").
Log on to the Duo Admin Panel and navigate to Applications.
Click Protect an Application, locate SAML - OpenDNS in the applications list, and click Protect this Application. See Getting Started for help.
OpenDNS 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|
Click Save Configuration to generate a downloadable configuration file.
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 OpenDNS 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!
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 OpenDNS SAML application JSON file you downloaded from the Duo Admin Panel earlier. Click the Upload button after selecting the JSON configuration file.
The OpenDNS SAML application is added.
Add the Duo Access Gateway as a new single sign-on provider for OpenDNS.
Log on to OpenDNS as an administrative user and navigate to Configuration → System Settings → Login Security. Under "Security Type" click SAML.
When asked "Which SAML based SSO Service would you like to use?" click Other and then click next.
On the OpenDNS Metadata page click next.
On the Upload Metdata page under "Option A: Upload XML File" click Choose File and select the dag.xml metadata file we downloaded earlier. You will be automatically taken to the Validate SAML Configuration page.
Click Test your SAML configuration. A pop-up will appear and request an email address to test the SSO Login. Type in your email address and then click Login via SAML. This redirects to the Duo Access Gateway login page. Enter your primary directory logon information, approve Duo two-factor authentication. You will see a "Success" message. Close this window and to the configuration page.
You will be asked to accept terms and conditions and click save configuration and notify users. This will enable SSO and send an email to your employees notifying them of the change.
Learn more about OpenDNS SSO at the OpenDNS Support site.
Navigate to the OpenDNS login page and click the Single sign on link. Enter your email address and click Sign In. 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 OpenDNS site after authenticating.
Congratulations! Your OpenDNS users now authenticate using Duo Access Gateway.
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 OpenDNS. Learn more about configuring OpenDNS SSO with AD FS at the OpenDNS Support site.
After you have successfully configured and tested AD FS SSO login to OpenDNS 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 OpenDNS.
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.