# Duo

**Overview**

This guide walks you through the process of configuring Duo Single Sign-On (SSO) using Security Assertion Markup Language (SAML). We will provide instructions for integrating Duo with a SAML Identity Provider (IdP). This documentation uses Azure Active Directory (Azure AD) as the example IdP, but the steps are similar for other providers like Okta, ADFS, and others.

**Step 1: Create SAML Source in Duo SSO**

If you don't have a SAML source set up in Duo SSO yet, please create a new one and provide the following information with us to proceed with the configuration:

* **Entity ID**: The unique identifier used by your IdP to recognize the Duo application.
* **Assertion Consumer Service (ACS) URL**: The endpoint where your IdP sends the SAML authentication responses.
* **Audience Restriction**: The identifier for the service provider (Duo) that the IdP should match with the SAML response.
* **Metadata URL**: The URL where the IdP can retrieve Duo’s metadata to automatically configure the SSO connection.

<figure><img src="/files/vpfHVmqA4K2Atp1YOCZd" alt=""><figcaption><p>Create new SSO SAML source</p></figcaption></figure>

<figure><img src="/files/eYi1Drfm254KQck02nTQ" alt=""><figcaption><p>Duo SAML details</p></figcaption></figure>

#### **Step 2: Create a SAML Application in Azure AD**

1. **Log in to Azure AD:**
   * Sign in to the [Azure portal](https://portal.azure.com) using your administrator credentials.
2. **Register a New Application:**
   * Navigate to **Azure Active Directory > Enterprise applications**.
   * Click on **New application**.
   * Select **Create your own application**.
   * Provide a name for the application and choose **Integrate any other application you don't find in the gallery (Non-gallery)**.<br>

     <figure><img src="/files/SPmFMIxOFXn5VRGOQ78O" alt=""><figcaption></figcaption></figure>
3. **Set Up SAML-based SSO:**
   * Under the application’s settings, go to **Single sign-on**.
   * Choose **SAML** as the single sign-on method.<br>

     <figure><img src="/files/ekW0c3ZmgCwrk3G097Ug" alt=""><figcaption></figcaption></figure>
4. **Basic SAML Configuration:**
   * Fill in the following fields:
     * **Identifier (Entity ID)**: Enter the **Entity ID** value from **Step 1**
     * **Reply URL (Assertion Consumer Service URL)**: Enter the **Assertion Consumer Service (ACS) URL** from **Step 1**
     * **Sign on URL**: Leave this blank unless Duo provides a specific value.
5. **User Attributes & Claims:**
   * Ensure the required claims are set up. Typically, you should configure:
     * **NameID**: Set this to the user’s email address or another unique identifier.
     * **FirstName**: Given name of the user.
     * **LastName**: Surname of the user.<br>

       <figure><img src="/files/3kHq8dsAWlSJKZ9dJSkM" alt=""><figcaption></figcaption></figure>
6. **SAML Signing Certificate:**
   * Edit **Token signing certificate** then download the PEM certificate<br>

     <figure><img src="/files/wCUXVItdDjBYVfzGkQIx" alt=""><figcaption></figcaption></figure>

     <figure><img src="/files/5KrRO10kULY6a7tjyPPB" alt=""><figcaption></figcaption></figure>

**Step 3: Configure Duo Single Sign-On**

* Fill the following fields in Duo with the info from Azure
  * **Entity ID:** Enter **Microsoft Entra Identifier** from Azure
  * **Single Sign-On URL:** Enter **Login URL** from Azure
  * **Single Logout URL:** Enter **Logout URL** from Azure

<figure><img src="/files/9yqVyPPug3tkGlBwAoiE" alt=""><figcaption><p>Azure SSO</p></figcaption></figure>

<figure><img src="/files/Ytkcy395Fyp50OlGZk1l" alt=""><figcaption><p>Duo SSO</p></figcaption></figure>

***Note:*** If you experience any issues during the linking process or have questions related to Single Sign-On (SSO) integration, please reach out to our support team at <founders@tryprotege.com>. We are available to assist you and ensure a seamless integration with your authentication system.


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