What is the Duo Authentication Proxy?. Start Duo Security Authentication Proxy Service : 5. Here are detailed instructions for running the connectivity tool. Duo Authentication Proxy with VNC Servers RADIUS >Using Duo Authentication Proxy with VNC Servers RADIUS. in RADIUS Server profile, if you change the IP to second DUO proxy 10. The steps for installing the Duo authentication proxy are beyond the scope of this article. In the Admin Dashboard, click Applications, then click Protect an Application. The second DUO Proxy server configuration is correct and works if I dont use authentication sequence. Duo supports installing the Authentication Proxy on Windows Server 2012 and later, which are 64-bit operating systems. Within Serviceson your server, right-click the Duo Security Authentication Proxy service, and then click Preferences. Fill in the blank with the RADIUS configuration used in the Duo Authentication Proxy Manager andclickSubmit. With both RADIUS server and client config at the Duo Proxy it can use MSCHAPv2 instead of PAP, and you could do password changes. DUO and other systems offer a radius server. Duo integration options for Cisco AnyConnect VPN with ASA and FTD>Duo integration options for Cisco AnyConnect VPN with ASA and FTD. in RADIUS Server profile, if you change the IP to second DUO proxy 10. Configure Duo Two Factor Authentication for ISE. The Duo Authentication Proxys RADIUS dictionary includes standard RADIUS RFC defined attributes as well as some vendor specific attributes from Cisco, Juniper,. Guide to Duo Authentication Proxy Installation and Configuration …. DUO Proxy: Radius doesnt seem to answer. 119 in RADIUS Server profile, if you change the IP to second DUO proxy 10. This repo provides a way to build Duo Authentication Proxy into a docker image and run it as a container. key ; ssl_cert_path=C:/My Folder/Duo Security Authentication Proxy/mydomain. Duo’s Authentication Proxy (sometimes referred to as the Authproxy) is a local service needed to properly configure certain Duo-protected applications. The Duo Authentication Proxy Manager is a Windows utility for managing the Authentication Proxy installation on the Windows server where you install the. Hi everyone, Im trying to add duo to a RADIUS authentication process to a router client device. On External Radius Serverstab, clickAdd. Your switch will send a Radius request to duo auth proxy, if both (proxy and radius server) are installed on the same machine either of them might get the request first, which can create a problem, I would suggest installing duo proxy on a separate machine/VM. These are the attributes in the Authentication Proxys RADIUS dictionary as of March 2022: # RFC 2865 or RFC 2866 # ATTRIBUTE User-Name 1 string ATTRIBUTE User-Password 2 octets ATTRIBUTE CHAP-Password 3 octets ATTRIBUTE NAS-IP. com/docs/ciscoise-radius#install-the-duo-authentication-proxy Note: This machine must have access to the ISE and Duo Cloud (Internet) Step 2. DUO for PA firewall >Nominated Discussion: Configure a second DUO for PA firewall. This is the IP address of the computer running Duo Authentication Proxy, e. According to Duos terminology, the Opengear is the RADIUS device that runs a RADIUS client to connect to the Duo authentication proxy; In Duos Network Diagram section, the Opengear is the Application or Service To enable Opengears Use Remote Groups feature to control user authorization, you must also: Use a real RADIUS server as your. On the Duo Admin Panel navigate to Applicaitons and click Protect an. Does the Duo Authentication Proxy support in. RADIUS application to send the NAS. Duo Configuration Step 1. Duo Configuration Step 1. Opengear GUI configuration Where the Duo authentication proxy is at 192. Unifi USG L2TP VPN with DUO 2FA setup. If you will reuse an existing Duo Authentication Proxy server for this new application, you can skip the install steps and go to Configure the Proxy. In order to configure external RADIUS servers, navigate to Administration > Network Resources > External RADIUS Servers > Add, as shown in the image: Step 2. com/docs/authproxy-reference The Duo Authentication Proxy is an on-premises software service that receives authentication requests from your local devices and applications via RADIUS or LDAP, optionally performs primary authentication against your existing LDAP directory or RADIUS authentication server, and …. 19 secret=Radius password pass_through_all=true. To use the configured external RADIUS server, a RADIUS server. Duo Auth Proxy Configuration 1. Using Duo Authentication Proxy with VNC Servers RADIUS authentication. Please refer to the Duo Authentication Proxy Reference for more information about these two RADIUS attribute options. Yes, the Duo Authentication Proxy can run on the same server as Microsoft TMG, RRAS, or UAG, so long as the address for the authentication server for the application (TMG, RRAS, UAG) is set to local loopback (127. Sophos RADIUS Server, DUO RADIUS server and LDAP client –. For more information on configuring the Authentication Proxy, see our Authentication Proxy reference guide. In the IP Address text box, type the IP address of the Duo Authentication Proxy. Typically when someone uses duo_only_client or radius_server_duo_only their application or service is able to have separate primary and secondary authentication servers. You need this information for the Duo Authentication Proxy configuraton. The IP address of the Switch must be configured along with the RADIUS secret key. So you get a username+password and XG and XG can forward this to a Radius OR AD to check, if this is a valid request. My normal RADIUS implementation works fine, from my DUO auth proxy box (with it all turned off) I can ssh to the router using domain credentials, running a packet capture on the NPS I can see requests and responses and authentication succeeds. com/docs/ciscoise-radius#install-the-duo-authentication-proxy Note: This machine must have access to the ISE and Duo Cloud (Internet) Step 2. Add users who will access the VPN. Secondary authentication via Duo Security’s service 6. Navigate to RADIUS Server Sequencestab and clickAdd. Try using PAP on the system communicating with the Authentication Proxy. Note :On this document the Duo Auth Proxy Manager is installed on the same Windows Server that hosts Active Directory services. It is a simple install and requires minimal resources on the box. Open Notepad as Administrator by searching for Notepad in the Start Menu, then right click the Notepad app result and click. Press OK • Leave your window open and go to Active Directory. Start the Duo Authentication Proxy On the Windows computer where the Duo Security Authentication Proxy is installed, open an Administrator command prompt and type this command: net start DuoAuthProxy Test the Integration To test the integration of your Mobile VPN with SSL, authenticate with a mobile token on your mobile device. and authentication sequence has two profiles. Set check for Enable this RADIUS Client 2. Customization of the Authentication Proxys RADIUS directory is not supported. Before: Application <-> Duo proxy (radius_server_xxx) <-> AD (via ad_client) After:. Enter some information in the. With this setup, RADIUS will be chained between the ISE and Authentication proxy to perform Two Factor Authentication. Hi, it s a DUO product: https://duo. The second DUO Proxy server configuration is correct and works if I dont use authentication sequence. Duo Integration with Active Directory and. Run the Duo Authentication Proxy Manager application and complete the configuration for both Active Directory client and ISE Radius Server and click Validate. The first setup involves a Cisco Firewall, ISE and Duo Authentication Proxy. Nominated Discussion: Configure a second DUO for PA firewall MFA. Configuring Duo Authentication Proxy Open Notepad as Administrator by searching for Notepad in the Start Menu, then right click the Notepad app result and click Run as administrator Click File then click Open and navigate to C:/Program Files/Duo Security Authentication Proxy/conf. Add users who will access the. Has anyone had any success with using DUO Auth Proxy in Azure and then having it use Azure AD as an LDAP source for authentication? I know there is integration into Azure AD for MFA for office etc with DUO but we are trying to use the DUO Auth Proxy as a radius server for another 3rd party software to get MFA (via duo)! Thanks for any feedback NS 2. Configure connection settings: 8. Once the authentication proxy is installed, it needs to be configured. Typically when someone uses duo_only_client or radius_server_duo_only their application or service is able to have separate primary and secondary authentication servers. The loopback address needs to be set in the RADIUS server section of the Authentication Proxy configuration file and in RRAS. The Duo Authentication Proxy is an on-premises software service that receives authentication. Primary authentication using Active Directory or RADIUS; Duo Authentication. Duo Configuration Step 1. Configuring Duo Authentication Proxy. [radius_server_auto] client_ip_attr=NAS-IP-Address. Users on Windows workstations may use integrated/SSPI authentication to sign into vCenter (the “Use Windows session authentication” option TheZealous mentioned earlier in this thread). To enable RADIUS within Duo there are a couple of steps Enable the Cisco ASA VPN as a Duo application Install the Duo RADIUS proxy within the on-premises infrastructure Configure the connection between the local Cisco and the RADIUS proxy Duo Application Enabling RADIUS as an application is straightforward. In the Shared Secret and Confirm Secret text boxes, type a shared secret key. Duo requires an on-premises authentication proxy. When DUO enters the equation things get a bit more. If in Authentication Profile, I have two profiles. Duo’s Authentication Proxy (sometimes referred to as the Authproxy) is a local service needed to properly configure certain Duo-protected applications. Expand Cisco ISE tab and Navigate to Administrationthen clickNetwork Resourcesand clickExternal RADIUS Servers. The RADIUS application must have one of the following configurations in the Authentication Proxy: duo_only_client and any RADIUS server section (e. Copy the Integration key, Secrety key and the API Hostname. This proxy acts as a RADIUS server, and it can run on Windows or Linux. Search for RADIUS and click Protect next to the RADIUS option (padlock icon) On the next screen, you will be shown an Integration key, Secret key, and API hostname. The Authentication Proxy can be installed on a physical or virtual host, on Windows or Linux machines. Once the authentication proxy is installed, it needs to be configured. If in Authentication Profile, I have two profiles. If this value is not set, the Authentication Proxys default is to send the value of the RADIUS calling-station-id to Duo and to the upstream primary authenticator as the client IP address. Duo authentication proxy receives authentication response 7. Deploy the Duo Proxy appliance The next step in the process to implement the 2FA prompt for vCenter is deploy the Duo authentication proxy. The simplest configuration is to configure DAP with a LDAP for primary authentication and a series of radius clients for our various devices. Duo Authentication Proxy 2. Authentication Proxys RADIUS >What attributes are in the Authentication Proxys RADIUS. and authentication sequence has two profiles. SonicWALL TZ + Duo + ActiveDirectory/LDAP?. On the Duo Admin Panel navigate to Applicaitons and click Protect an Application. Friendly name: Duo Auth Proxy (DAP) 3. Answer Yes. Your switch will send a Radius request to duo auth proxy, if both (proxy and radius server) are installed on the same machine either of them might get the request first, which can create a problem, I would suggest installing duo proxy on a. Authentication Proxy insert an attribute, not just pass >Can Authentication Proxy insert an attribute, not just pass. For example, the first duo proxy IP is 10. Configure Duo Integration with Active Directory and ISE for …. Duo Authentication Proxy connection established to Duo Security over TCP port 443 5. Duo’s Authentication Proxy (sometimes referred to as the Authproxy) is a local service needed to properly configure certain Duo-protected applications. Download and Install Duo Auth Proxy Manager from https://duo. Can Authentication Proxy insert an attribute, not just pass thru. Add the Duo RADIUS server Sign in to Sophos UTM WebAdmin. Make sure that the RADIUS server hosting NPS is configured to accept authentication requests from the Duo Authentication Proxy and that you have added the line pass_through_all=true to ensure that RADIUS group attributes are communicated during the login process. Using Duo Authentication Proxy with VNC Servers RADIUS …. Sophos RADIUS Server, DUO RADIUS server and LDAP client – marginally the easiest to set up. The Proxy Manager comes with Duo Authentication Proxy for Windows version 5. Nominated Discussion: Configure a second DUO for PA firewall. You can run this from a Windows command prompt to test whether the server is listening on the specified RADIUS port. In the Admin Dashboard, click Applications, then click Protect an Application. In order to configure external RADIUS servers, navigate to Administration > Network Resources > External RADIUS Servers > Add, as shown in the image: Step 2. Add the Duo RADIUS server Sign in to Sophos UTM WebAdmin. Using Duo Authentication Proxy with VNC Servers RADIUS. In the Primary Server Settings section, select the Enable RADIUS Server check box. [radius_client] host=10. Set Manual Share secret and paste in the shared secret you created above. The second DUO Proxy server configuration is correct and works if I dont use authentication sequence. A summary of the different methods of authentication with DUO Proxy: Sophos AD Server, DUO LDAP client and server – only method that currently supports UPN users and Groups. Expand Cisco ISE tab and Navigate to Administrationthen clickNetwork Resourcesand clickExternal RADIUS Servers. Sophos Firewall: 3 ways to setup Sophos Firewall 18 with DUO 2FA. Make a new security group VPN-Users. You can deploy NPS in your domain to act as the RADIUS server, and NPS itself would authenticate against AD. For Linux-based Authentication Proxy servers, say yes to the prompt during installation that asks if you want an init script created. the DUO Proxy, RADIUS server. When a user logs into the TZ, the TZ forwards the authentication request to the Duo Authentication Proxy server using RADIUS. The installation file path has changed. [radius_server_auto] client_ip_attr=NAS-IP-Address. In order to configure external RADIUS servers, navigate to Administration > Network Resources > External RADIUS Servers > Add, as shown in the image: Step 2. Configuring Duo Authentication Proxy Open Notepad as Administrator by searching for Notepad in the Start Menu, then right click the Notepad app result and click Run as administrator Click File then click Open and navigate to C:/Program Files/Duo Security Authentication Proxy/conf. Configure Duo Integration with Active Directory and. Navigate to Definitions & Users> Authentication Services> Servers. Our scenario is we have network devices that we do DUO authentication for administrative access to the devices. Configuring Duo Authentication Proxy Open Notepad as Administrator by searching for Notepad in the Start Menu, then right click the Notepad app result and click Run as administrator Click File then click Open and navigate to C:/Program Files/Duo Security Authentication Proxy/conf. The same concept applies if a Cisco FTD or ASA was used. To enable RADIUS within Duo there are a couple of steps Enable the Cisco ASA VPN as a Duo application Install the Duo RADIUS proxy within the on-premises infrastructure Configure the connection between the local Cisco and the RADIUS proxy Duo Application Enabling RADIUS as an application is straightforward. 1) ISE RADIUS Proxy and Duo Authentication Proxy The first setup involves a Cisco Firewall, ISE and Duo Authentication Proxy. It is possible to configure the Duo Authentication Proxy to send the NAS-IP-Address, or any other standard RADIUS attribute, as the client IP by using the client_ip_attr parameter: [radius_server_auto] client_ip_attr=NAS-IP-Address. Securing Cisco AnyConnect with YubiKeys – Yubico. Typically when someone uses duo_only_client or radius_server_duo_only their application or service is able to have separate primary and secondary authentication servers. Configure the Duo Authentication Proxy To configure the Authentication Proxy, add a [radius_client] section at the beginning of the Authentication Proxy configuration file that includes the properties described in this list. [radius_server_auto] client_ip_attr=NAS-IP-Address. The authentication proxy is best installed in a very small-footprint Linux VM. Click New Authentication Serverto create a new RADIUS. Apply the following settings: Click Testunder Test server settingsto verify that Sophos UTM is able to connect to the Duo Authentication proxy. To authenticate from the Duo Proxy to Active Directory as a RADIUS client, you can deploy Microsofts Network Policy Server (NPS) as a RADIUS server or a. Configure External RADIUS Servers on ISE. cfg for duo authentication proxy. A summary of the different methods of authentication with DUO Proxy: Sophos AD Server, DUO LDAP client and server – only method that currently supports UPN users and Groups. pem exempt_primary_bind=false ; The above is the correct setting for how XG works. Users on Windows workstations may use integrated/SSPI authentication to sign into vCenter (the “Use Windows session authentication” option TheZealous mentioned earlier in this thread). Navigate to RADIUS Server Sequencestab and clickAdd. Can I configure a RADIUS application to send the NAS. Can the Duo Authentication Proxy be installed on the same server as. cfg for duo authentication proxy. If this value is not set, the Authentication Proxys default is to send the value of the RADIUS calling-station-id to Duo and to the upstream primary authenticator as the client IP address. Note :On this document the Duo Auth Proxy Manager is installed on the same Windows Server that hosts Active Directory services. Testing Duo RADIUS with NTRadPing Download NTRadPing and extract it to a Windows machine that can send requests to the Duo Authentication Proxy server you Launch NTRadPing. In the example above, the port is set to 1812, or the default for RADIUS. The Duo Authentication Proxy Manager is a Windows utility for managing the Authentication Proxy installation on the Windows server where you install the Authentication Proxy. In the Port text box, leave the default port setting of 1812. Fill in the blank with the RADIUS configuration used in the Duo Authentication Proxy Manager andclickSubmit. Duo Auth Proxy Configuration 1. If you use AD Server, there is no Integration of DUO what soever. For example, the first duo proxy IP is 10. 23 IP Address of the Radius server. The Duo Authentication Proxy Manager is a Windows utility for managing the Authentication Proxy installation on the Windows server where you install the Authentication Proxy. Configuring Duo Security MFA for Horizon Unified Access. When you attempt to log in to an application protected by the Duo Authentication Proxy, the authentication fails. Start Duo Security Authentication Proxy Service : 5. We recommend a system with at least 1 CPU, 200 MB disk space, and 4 GB RAM Authentication, set: Authentication Configuration -> Authentication Method: RADIUSLocal. Our scenario is we have network devices that we do DUO authentication for administrative access to the devices. Our scenario is we have network devices that we do DUO authentication for administrative access to the devices. Duo requires an on-premises authentication proxy. For more information on configuring the Authentication Proxy, see our Authentication Proxy reference guide. To launch the Proxy Manager utility: Open the Start Menu and go to Duo Security. Guide to Duo Authentication Proxy Installation and Configuration Best. The Duo Authentication Proxys RADIUS dictionary includes standard RADIUS RFC defined attributes as well as some vendor specific attributes from Cisco, Juniper, Microsoft, and Palo Alto. The Duo Authentication Proxy supports these RADIUS authentication protocol variants: PAP. This works great except for those devices that require. Duo Auth Proxy Configuration 1. Guide to configuring the Duo Authentication Proxy as a RADIUS client in NPS. Click Apply, and the next time users log on, they will have 2-factor-authentication enabled. In the IP Address text box, type the IP address of the Duo Security Authentication Proxy. Why might I see Cannot proxy RADIUS requests to this. With this setup, RADIUS will be chained between the ISE and Authentication proxy to perform Two Factor Authentication. Multiple external RADIUS servers can be configured and used to authenticate users on the ISE. Add the Duo RADIUS server Sign in to Sophos UTM WebAdmin. Configure RAS to communicate with Duo: RAS Console → Farm → Connections → Multi-Factor authentication Tab. Within Services on your server, right-click the Duo Security Authentication Proxy service. Click Set up VNC Server for RADIUS Configure the settings shown as per the below: RADIUS server. Duo Security RADIUS Authentication Integration Guide. The Authentication Proxy logs show the error: Cannot proxy RADIUS request to this primary authenticator. Navigate to Definitions & Users> Authentication Services> Servers. Click the Duo Authentication Proxy Manager icon to. The Duo Authentication Proxy can also be configured to reach Duos service through an already-existing web proxy that supports the CONNECT protocol. Read more about how PAP is secured when used with Duo here. Configure RAS to communicate with Duo: RAS Console → Farm → Connections → Multi-Factor authentication Tab. You configure LDAP auth with vCenter pointing to the Duo Authentication Proxy. This is generally accomplished via RADIUS by way of the DUO Authentication Proxy (DAP). So, primary auth is handled as it was before Duo, and you add Duo via RADIUS as a secondary authenticator. Set IP Address of the machine with DAP. A summary of the different methods of authentication with DUO Proxy: Sophos AD Server, DUO LDAP client and server – only method that currently supports UPN users and Groups. Yes, the Duo Authentication Proxy can run on the same server as Microsoft TMG, RRAS, or UAG, so long as the address for the authentication server for the application (TMG, RRAS, UAG) is set to local loopback (127. 23 IP Address of the Radius server. For Windows-based Authentication Proxy servers, configure the Duo Security AuthenticationProxy Service to include some recovery options in case of power or network failures: Step 1. Authentication Proxy Reference. Configure Duo Multi Factor Authentication to Work with UCS …. When you attempt to log in to an application protected by the Duo Authentication Proxy, the authentication fails. 0 includes a connectivity tool that can help you troubleshoot this - authproxy_connectivity_tool. Expand Cisco ISE tab and Navigate to Administrationthen clickNetwork Resourcesand clickExternal RADIUS Servers. Click on the + symbol and choose Radius and select DUO. Friendly name: Duo Auth Proxy (DAP) 3. This is generally accomplished via RADIUS by way of the DUO Authentication Proxy (DAP). AD Authentication and Expired passwords on Duo Auth Proxy. 119 in RADIUS Server profile, if you change the IP to second DUO proxy 10. The Authentication. This proxy acts as a RADIUS server, and it can run on Windows or Linux. On External Radius Serverstab, clickAdd. The steps for installing the Duo authentication proxy are beyond the scope of this article. 254, under Serial & Network -> Authentication, set: Authentication Configuration ->. Primary authentication uses Active Directory or RADIUS 4. To configure the Duo Authentication Proxy to work with the application when the. XG can do a authentication against a Radius OR a AD Server. Start the Duo Authentication Proxy On the Windows computer where the Duo Security Authentication Proxy is installed, open an Administrator command prompt and type this. com/docs/radius#Install The Duo Authentication Proxy h=ID=SERP,5721. [radius_client] host=10. Before: Application <-> Duo proxy (radius_server_xxx) <-> AD (via ad_client) After:. To use the configured external RADIUS server, a RADIUS server sequence has to be configured similar to Identity source sequence. The simplest configuration is to configure DAP with a LDAP for primary authentication and a series of radius clients for our various devices. Duo Authentication Proxy 2. Hi everyone, I’m trying to add duo to a RADIUS authentication process to a router client device. Click Recovery, then configure options to restart the service after failures. Nominated Discussion: Configure a second DUO for PA firewall …. With both RADIUS server and client config at the Duo Proxy it can use MSCHAPv2 instead of PAP, and you could do password changes. Make sure you have the right config on authproxy. The workflow for two-factor authentication with Duo is shown here: The user initiates primary authentication to the WatchGuard Firebox. The Duo Authentication Proxy can be installed on a physical or virtual host. Learn more about using the Proxy Manager in the Duo Authentication Proxy Reference before you continue. 5 (VMware vCenter Server …. You will need these when configuring Duo Authentication Proxy (below). Configuring Parallels RAS to work with DUO (RADIUS) MFA Provider. Configuring Parallels RAS to work with DUO …. 1) ISE RADIUS Proxy and Duo Authentication Proxy The first setup involves a Cisco Firewall, ISE and Duo Authentication Proxy. If you setup a radius authentication, XG will create. Click New Authentication Serverto create a new RADIUS server. In the Primary Server Settings section, select the Enable RADIUS Server check box. Download and Install Duo Auth Proxy Manager from https://duo. So, primary auth is handled as it was before Duo, and you add Duo via RADIUS as a secondary authenticator. For example: [radius_client] host=192. The Proxy Manager only functions as part of a local Duo Authentication Proxy installation on Windows servers. Set check for Enable this RADIUS Client 2. With both RADIUS server and client config at the Duo Proxy it can use MSCHAPv2 instead of PAP, and you could do password changes. logging into switch with radius and duo mfa. Duo Radius Authentication ProxyMake sure you have the right config on authproxy. The Duo server verifies the user’s LDAP credential against your LDAP server, and if that’s successful it contacts Duo’s cloud service to send the 2FA request to the user. 1) ISE RADIUS Proxy and Duo Authentication Proxy. Guide to configuring the Duo Authentication Proxy as a RADIUS. Cisco ISE sends authentication request to the Duo Authentication Proxy 3. Configuring Duo Security MFA for Horizon Unified Access Gateway. How can I troubleshoot RADIUS authentication with …. It is possible to configure the Duo Authentication Proxy to send the NAS-IP-Address, or any other standard RADIUS attribute, as the client IP by using the client_ip_attr parameter: [radius_server_auto] client_ip_attr=NAS-IP-Address. Duo Integration with Sophos XG for 2FA. Duo Security Authentication Integration Guide. secret=cisco123 Password on the Radius server to register the network device. Guide to Duo Authentication Proxy Installation and. You configure LDAP auth with vCenter pointing to the Duo Authentication Proxy. Download and Install Duo Authentication Proxy Server on a Windows or linux machine: https://duo. Your switch will send a Radius request to duo auth proxy, if both (proxy and radius server) are installed on the same machine either of them might get the request first, which can create a problem, I would suggest installing duo proxy on a separate machine/VM. Duo Authentication Proxy provides a local proxy service to enable on-premise integrations between VPNs, devices, applications, and hosted Duo or Trustwave two-factor authentication (2fa). 1) ISE RADIUS Proxy and Duo Authentication Proxy The first setup involves a Cisco Firewall, ISE and Duo Authentication Proxy. 254, under Serial & Network -> Authentication, set: Authentication Configuration -> Authentication Method: RADIUSLocal (or your preferred RADIUS scheme) Authentication Configuration -> Disable Accounting: . Read more about using the Authentication Proxy with LDAP or RADIUS. Change the Authentication dropdown to Windows password + RADIUS authentication. There are no ; quotation marks even if the folders have spaces! ; ssl_key_path= C:/My Folder/Duo Security Authentication Proxy/mydomain. Download and Install Duo Authentication Proxy Server on a Windows or linux machine: https://duo.