The Azure MFA service provides this response back to the NPS extension on the NPS server. If all conditions, as specified in the NPS Connection Request and Network Policies, are met (for example, time of day or group membership restrictions), the NPS extension triggers a request for secondary authentication with Azure Multi-Factor Authentication. NPS Extension for Azure MFA: NPS Extension for Azure MFA only performs Secondary Auth for Radius requests in AccessAccept State. Network Policy Server - RADIUS has 4 default . The Network Policy Server (NPS) extension for Azure MFA adds cloud-based MFA capabilities to your authentication infrastructure using your existing servers. Use UTM's IP for the network as client IP. If you take a close look at the logs on the NPS server, you'll see that when the MFA authentication succeeds, the log does NOT contain the name of the NPS policy---this is a signal that the NPS server has somehow lost the context surrounding the MFA authentication. In this step, you need to configure certificates for the NPS extension to ensure secure communications. Does anyone have any ideas as to what could be causing this issue for just a few users? Hi, I've setup NPS server with NPS extension for MFA to be used in order to use 2-factor authentication for clients VPN requests. In my RADIUS client, I declare the NPS server and then I attempt to log in. Firewall. Install NPS Extension. Request received for User username with response state AccessReject, ignoring request. Once the extension receives the response, and if the MFA challenge succeeds, it completes the authentication request by providing the NPS server with security tokens that include an MFA claim, issued by Azure STS. Activate azure MFA for user. Instead, they need to be on dedicated NPS servers that have the Azure extension installed. Error: "NPS Extension for Azure MFA: NPS Extension for Azure MFA only performs Secondary Auth for Radius requests in AccessAccept State. Comprising multiple authentication factors presents a significant challenge for attackers. NPS Extension for Azure MFA: NPS Extension for Azure MFA only performs Secondary Auth for Radius requests in AccessAccept State. For example, you might have SQL logging enabled and the SQL server is offline temporarily. The Network Policy Server (NPS) extension for Azure MFA adds cloud-based MFA capabilities to your authentication infrastructure using your existing servers. As mentioned above, in the end we did successfully implement this customer's requirement by leveraging the SAML IdP in Azure to handle the authentication process and then perform SAML-based single sign-on . I am configuring MFA on my RDS 2019 environment using the Azure NPS extension. This option is great for organizations that want secure VPN access for users . Install the NPS extension from here, there are 2 version 1.0.1.16 & 1.0.1.20 (1.0.1.21 is available but on request to Microsoft) To make sure Azure MFA accept the request from the NPS server, Once you install it you have to run the script that comes with the NPS extension. Azure MFA and Check Point VPN agent. I have a standard RADIUS server (A) for rules and exceptions and another RADIUS server (B) with the Azure NPS extension. Azure MFA With Microsoft NPS Pre-Requisites. To test that this was actually the case I created a brand new user in our on prem AD and let it sync to our Azure AD. Azure - NPS Extension for Azure MFA - Ignoring Request Rob 21/09/2017 27/09/2017 No Comments on Azure - NPS Extension for Azure MFA - Ignoring Request So I was keen to move away from a dedicated MFA server and the new NPS Extension for Azure MFA looked like the perfect solution. The NPS-log from the NPS-server with the extension get's spammed with: "The request was discarded by a third-party extension DLL file." The NPS-log from the NPS-server acting as a RADIUS Proxy gets: "The remote RADIUS (Remote Authentication Dial-In User Service) server did not respond." every tenth second. If all conditions as specified in the NPS Connection Request and Network Policies are met (for example, time of day or group membership restrictions), the NPS extension triggers a request for secondary authentication with Azure MFA. Due to the lack of Azure AD MFA support in ISE, and as a quick'n'dirty solution, I built a win2016 NPS server and installed the MFA extension and then changed my VPN policy to use the External Radius sequence. Note I have installed the NPS Extension for Azure MFA to work with ASA AnyConnect and provide a more robust VPN with 2FA mechanism, the same 2FA that users have for O365. Azure MFA checks if the user has MFA enabled. We are using Azure MFA to authenticate to our client VPNs via Radius to an NPS server. Install a Network Policy Server (NPS) extension for Azure Multi-Factor Authentication (MFA), configure an Azure Multi-Factor Authentication (MFA) server, and set up RADIUS authentication with the CloudGen Firewall as RADIUS client. Next create connection request policy for the UTM. when I connect to VPN, I got a request to approve MFA and I reject it , or I ignore it without response, I got connected to VPN, and the event viewer is: NPS Extension for Azure MFA: CID: 7b629c83-1537-4dd6-8da2-d486fac54b79 :Challenge requested in Authentication Ext for User omar with state 300d6952-5c9d-4b34-b838-1f631c776df2 MFA Settings. NPS Extension triggers a request to Azure MFA for the secondary authentication. 11-15-2021 08:24 AM. In this step, you need to configure certificates for the NPS extension to ensure secure communications. The first step in adding MFA is moving the RD CAPs to two centralized servers running NPS. and event view on NPS shows the below message and discarding the auth request.. NPS Extension for Azure MFA: CID: xxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxx : Request Discard for user user@domain.com with Azure MFA response: UserNotFound and message: The specified user was not found.,,,xxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxx. The Azure MFA server supports only PAP and MSCHAPv2 when acting as a RADIUS server. activated Sign-in to Azure AD with email as an alternate login ID, configured the NPS extension to use mail as login ID and we get the following error: NPS Extension for Azure MFA: CID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx : Request Discard for user [mailaddress] with Azure MFA response: UserNotFound and message: The specified user was not . Once the extension receives the response, and if the MFA challenge succeeds, it completes the authentication request by providing the NPS server with security tokens that include an MFA claim, issued by Azure STS. First open the Certificates Snap-in and delete the old certificate on NPS. Azure MFA With Microsoft NPS Pre-Requisites. The story I have created this blog to detail and describe how a Network Policy Server (NPS) is used to integrate with an Azure VPN gateway using RADIUS to provide Multi-Factor Authentication (Azure MFA) for point-to-site connections to your Azure environment. It works, but debugging problems can be a problem because the Azure MFA plug-in in NPs doesn't log any usable information. Both tokens can be in Microsoft Authenticator, but only the one that Office 365 is using, can do the "pop-up", letting the user easy sign-in, like this: Nonetheless it's easier for the IT dept. On the NPS Extension for Azure MFA dialog box, click Close. Looking online I found Go To Azure - Enteprise Apps - Filter per Microsoft and check if the following are enabled Azure Multi Factor Client Auth Azure Multi Factor Connector Unfortunately, for me it didn't work and I have a different error NPS sends result back to ISE. On the NPS Extension for Azure MFA dialog box, click Close. NPS Extension for Azure MFA: CID: 6da75e38-6bbf-4616-84df-fa65b4c7905c :Exception in Authentication Ext for User Domain\username :: ErrorCode:: CID :6da75e38-6bbf-4616-84df-fa65b4c7905c ESTS_TOKEN_ERROR Msg:: Verify the client certificate is properly enrolled in Azure against your tenant and the server can access URL in Registry STS_URL. One of the following occurs: If the user does not have MFA enabled, go to step 8. 7m. Azure will check users authentication methods and send the request for authentication to user predefined device or user defined way. I install a Windows Server 2019 and join the domain, install NPS role (configured with IP and shared secret of RADIUS client) and NPS extension. Thanks, I have been through these and they don't help my issue. Request received for User username with response state AccessReject, ignoring request. The user may not have successfully responded to the MFA prompt, so the Azure AD Multi-Factor Authentication NPS extension is waiting for that event to complete. The NPS components include a Windows PowerShell script that configures a self-signed certificate for use with NPS. This makes Azure MFA the solution of choice for . Azure AD Connect communicates with Azure Active Directory, retrieves the user's details . If you encounter errors with the NPS extension for Azure AD Multi-Factor Authentication, use this article to reach a resolution faster. 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