Tutorial: Microsoft Entra SSO integration with FortiWeb Web Application Firewall

Article
10/23/2023

In this tutorial, you'll learn how to integrate FortiWeb Web Application Firewall with Microsoft Entra ID. When you integrate FortiWeb Web Application Firewall with Microsoft Entra ID, you can:

Control in Microsoft Entra ID who has access to FortiWeb Web Application Firewall.
Enable your users to be automatically signed-in to FortiWeb Web Application Firewall with their Microsoft Entra accounts.
Manage your accounts in one central location.

Prerequisites

To get started, you need the following items:

A Microsoft Entra subscription. If you don't have a subscription, you can get a free account.
FortiWeb Web Application Firewall single sign-on (SSO) enabled subscription.

Note

This integration is also available to use from Microsoft Entra US Government Cloud environment. You can find this application in the Microsoft Entra US Government Cloud Application Gallery and configure it in the same way as you do from public cloud.

Scenario description

In this tutorial, you configure and test Microsoft Entra SSO in a test environment.

FortiWeb Web Application Firewall supports SP initiated SSO.

Adding FortiWeb Web Application Firewall from the gallery

To configure the integration of FortiWeb Web Application Firewall into Microsoft Entra ID, you need to add FortiWeb Web Application Firewall from the gallery to your list of managed SaaS apps.

Sign in to the Microsoft Entra admin center as at least a Cloud Application Administrator.
Browse to Identity > Applications > Enterprise applications > New application.
In the Add from the gallery section, type FortiWeb Web Application Firewall in the search box.
Select FortiWeb Web Application Firewall from results panel and then add the app. Wait a few seconds while the app is added to your tenant.

Alternatively, you can also use the Enterprise App Configuration Wizard. In this wizard, you can add an application to your tenant, add users/groups to the app, assign roles, as well as walk through the SSO configuration as well. Learn more about Microsoft 365 wizards.

Configure and test Microsoft Entra SSO for FortiWeb Web Application Firewall

Configure and test Microsoft Entra SSO with FortiWeb Web Application Firewall using a test user called B.Simon. For SSO to work, you need to establish a link relationship between a Microsoft Entra user and the related user in FortiWeb Web Application Firewall.

To configure and test Microsoft Entra SSO with FortiWeb Web Application Firewall, perform the following steps:

Configure Microsoft Entra SSO - to enable your users to use this feature.
1. Create a Microsoft Entra test user - to test Microsoft Entra single sign-on with B.Simon.
2. Assign the Microsoft Entra test user - to enable B.Simon to use Microsoft Entra single sign-on.
Configure FortiWeb Web Application Firewall SSO - to configure the single sign-on settings on application side.
1. Create FortiWeb Web Application Firewall test user - to have a counterpart of B.Simon in FortiWeb Web Application Firewall that is linked to the Microsoft Entra representation of user.
Test SSO - to verify whether the configuration works.

Configure Microsoft Entra SSO

Follow these steps to enable Microsoft Entra SSO.

Sign in to the Microsoft Entra admin center as at least a Cloud Application Administrator.
Browse to Identity > Applications > Enterprise applications > FortiWeb Web Application Firewall > Single sign-on.
On the Select a single sign-on method page, select SAML.
On the Set up single sign-on with SAML page, click the pen icon for Basic SAML Configuration to edit the settings.
On the Basic SAML Configuration section, enter the values for the following fields:
1. In the Identifier (Entity ID) text box, type a URL using the following pattern: https://www.<CUSTOMER_DOMAIN>.com
2. In the Reply URL text box, type a URL using the following pattern: https://www.<CUSTOMER_DOMAIN>.com/<FORTIWEB_NAME>/saml.sso/SAML2/POST
3. In the Sign on URL text box, type a URL using the following pattern: https://www.<CUSTOMER_DOMAIN>.com
4. In the Logout URL text box, type a URL using the following pattern: https://www.<CUSTOMER_DOMAIN>.info/<FORTIWEB_NAME>/saml.sso/SLO/POST
Note

<FORTIWEB_NAME> is a name identifier that will be used later when supplying configuration to FortiWeb. Contact FortiWeb Web Application Firewall support team to get the real URL values. You can also refer to the patterns shown in the Basic SAML Configuration section.
On the Set up single sign-on with SAML page, in the SAML Signing Certificate section, find Federation Metadata XML and select Download to download the certificate and save it on your computer.

Create a Microsoft Entra test user

In this section, you'll create a test user called B.Simon.

Sign in to the Microsoft Entra admin center as at least a User Administrator.
Browse to Identity > Users > All users.
Select New user > Create new user, at the top of the screen.
In the User properties, follow these steps:
1. In the Display name field, enter B.Simon.
2. In the User principal name field, enter the username@companydomain.extension. For example, B.Simon@contoso.com.
3. Select the Show password check box, and then write down the value that's displayed in the Password box.
4. Select Review + create.
Select Create.

Assign the Microsoft Entra test user

In this section, you'll enable B.Simon to use single sign-on by granting access to FortiWeb Web Application Firewall.

Sign in to the Microsoft Entra admin center as at least a Cloud Application Administrator.
Browse to Identity > Applications > Enterprise applications > FortiWeb Web Application Firewall.
In the app's overview page, select Users and groups.
Select Add user/group, then select Users and groups in the Add Assignment dialog.
1. In the Users and groups dialog, select B.Simon from the Users list, then click the Select button at the bottom of the screen.
2. If you are expecting a role to be assigned to the users, you can select it from the Select a role dropdown. If no role has been set up for this app, you see "Default Access" role selected.
3. In the Add Assignment dialog, click the Assign button.

Configure FortiWeb Web Application Firewall SSO

Navigate to https://<address>:8443 where <address> is the FQDN or the public IP address assigned to the FortiWeb VM.
Sign-in using the administrator credentials provided during the FortiWeb VM deployment.
Perform the following steps in the following page.

a. In the left-hand menu, click User.

b. Under User, click Remote Server.

c. Click SAML Server.

d. Click Create New.

e. In the Name field, provide the value for <fwName> used in the Configure Microsoft Entra ID section.

f. In the Entity ID textbox, Enter the Identifier (Entity ID) value, like https://www.<CUSTOMER_DOMAIN>.com/samlsp

g. Next to Metadata, click Choose File and select the Federation Metadata XML file which you have downloaded.

h. Click OK.

Create a Site Publishing Rule

Navigate to https://<address>:8443 where <address> is the FQDN or the public IP address assigned to the FortiWeb VM.
Sign-in using the administrator credentials provided during the FortiWeb VM deployment.
Perform the following steps in the following page.

a. In the left-hand menu, click Application Delivery.

b. Under Application Delivery, click Site Publish.

c. Under Site Publish, click Site Publish.

d. Click Site Publish Rule.

e. Click Create New.

f. Provide a name for the site publishing rule.

g. Next to Published Site Type, click Regular Expression.

i. Next to Published Site, provide a string that will match the host header of the web site you are publishing.

j. Next to Path, provide a /.

k. Next to Client Authentication Method, select SAML Authentication.

l. In the SAML Server drop-down, select the SAML Server you created earlier.

m. Click OK.

Create a Site Publishing Policy

Navigate to https://<address>:8443 where <address> is the FQDN or the public IP address assigned to the FortiWeb VM.
Sign-in using the administrator credentials provided during the FortiWeb VM deployment.
Perform the following steps in the following page.

a. In the left-hand menu, click Application Delivery.

b. Under Application Delivery, click Site Publish.

c. Under Site Publish, click Site Publish.

d. Click Site Publish Policy.

e. Click Create New.

f. Provide a name for the Site Publishing Policy.

g. Click OK.

h. Click Create New.

i. In the Rule drop-down, select the site publishing rule you created earlier.

j. Click OK.

Create and assign a Web Protection Profile

Navigate to https://<address>:8443 where <address> is the FQDN or the public IP address assigned to the FortiWeb VM.
Sign-in using the administrator credentials provided during the FortiWeb VM deployment.
In the left-hand menu, click Policy.
Under Policy, click Web Protection Profile.
Click Inline Standard Protection and click Clone.
Provide a name for the new web protection profile and click OK.
Select the new web protection profile and click Edit.
Next to Site Publish, select the site publishing policy you created earlier.
Click OK.
In the left-hand menu, click Policy.
Under Policy, click Server Policy.
Select the server policy used to publish the web site for which you wish to use Microsoft Entra ID for authentication.
Click Edit.
In the Web Protection Profile drop-down, select the web protection profile that you just created.
Click OK.
Attempt to access the external URL to which FortiWeb publishes the web site. You should be redirected to Microsoft Entra ID for authentication.

Create FortiWeb Web Application Firewall test user

In this section, you create a user called Britta Simon in FortiWeb Web Application Firewall. Work with FortiWeb Web Application Firewall support team to add the users in the FortiWeb Web Application Firewall platform. Users must be created and activated before you use single sign-on.

Test SSO

In this section, you test your Microsoft Entra single sign-on configuration with following options.

Click on Test this application, this will redirect to FortiWeb Web Application Sign-on URL where you can initiate the login flow.
Go to FortiWeb Web Application Sign-on URL directly and initiate the login flow from there.
You can use Microsoft My Apps. When you click the FortiWeb Web Application tile in the My Apps, this will redirect to FortiWeb Web Application Sign-on URL. For more information about the My Apps, see Introduction to the My Apps.

Next steps

Once you configure FortiWeb Web Application Firewall you can enforce session control, which protects exfiltration and infiltration of your organization’s sensitive data in real time. Session control extends from Conditional Access. Learn how to enforce session control with Microsoft Defender for Cloud Apps.