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Two-Factor Authentication (2FA/MFA) for OpenVPN


OpenVPN is an open-source commercial software that implements VPN techniques to create secure point-to-point or site-to-site connections in routed or bridged configurations and remote access facilities. After setting up your own OpenVPN server, you may want to enhance it's security. One way to do that is to enable 2FA (Two-Factor Authentication) for your OpenVPN. When you integrate Two-Factor Authentication (2FA) on your OpenVPN Server, your users need to enter their username and password (first factor) as usual, and as a second factor they have to enter an authentication code which will be shared virtually on their device or in the form of a hardware token. This 2FA/MFA solution adds an additional security measure to prevent unwanted users getting access to your OpenVPN server.


Types of 2FA Authentication with RADIUS

The 2-factor authentication can be of two types depending on the VPN clients.

  • VPN Clients that support RADIUS Challenge.
  • VPN Clients that do not support RADIUS Challenge.

miniOrange 2FA authentication for OpenVPN Login

miniOrange accomplishes this by acting as a RADIUS server that accepts the username/password of the user entered as a RADIUS request and validates the user against the user store as Active Directory (AD). After the first level of authentication, miniOrange prompts the user with 2-factor authentication and either grants/revokes access based on the input by the user.


MFA 2FA Two-Factor authentication for OpenVPN

  1. Primary authentication initiates with the user submitting his Username and Password for OpenVPN.
  2. User request acts as an authentication request to RADIUS Server(miniOrange).
  3. miniOrange RADIUS server passes user credentials to validate against the credentials stored in AD (Active Directory) / Database.
  4. Once the user's first level of authentication gets validated AD sends the confirmation to RADIUS Server.
  5. Now miniOrange RADIUS Server asks for a 2-factor authentication challenge to the user.
  6. Here user submits the response/code which he receives on his hardware/phone.
  7. User response is checked at miniOrange’s RADIUS Server side.
  8. On successful 2nd factor authentication the user is granted access to connect over OpenVPN.

What are different 2FA/MFA methods supported for OpenVPN supported by miniOrange?

miniOrange provides 15+ 2FA/MFA authentication methods for OpenVPN secure access: OTP over SMS-Email, Push Notification, Software Token, Microssoft / Google Authenticator etc. You can opt for any of the 2FA methods to secure your OpenVPN. To integrate 2FA, you can enable RADIUS authentication in OpenVPN and configure policies in miniOrange to enable or disable 2FA for OpenVPN users.


Connect with any External Directories


miniOrange provides user authentication from various external directories such as miniOrange Directory, Microsoft AD, Azure AD, AWS Cognito and many more.

Can't find your Directory? Contact us on idpsupport@xecurify.com



Video Setup Guide


Get Free Installation Help - Book a Slot


miniOrange offers free help through a consultation call with our System Engineers to Install or Setup Two-Factor Authentication for OpenVPN solution in your environment with 30-day trial.

For this, you need to just send us an email at idpsupport@xecurify.com to book a slot and we'll help you setting it up in no time.



Enable Two-Factor Authentication (2FA)/MFA for OpenVPN Client to extend security level.

1. Add the Radius Client in miniOrange

  • Login into miniOrange Admin Console.
  • Go to Apps >> Manage Apps. Click on Add Application button.
  • Add OpenVPN application for MFA/Two-Factor Authentication(2FA)

  • Choose RADIUS as Application type and click on Create App button.
  • 2FA Two-Factor authentication for OpenVPN : Create Radius Application

  • Click on OpenVPN application tab. If you don't find your application click on Radius Client application tab.
  • 2FA Two-Factor authentication for OpenVPN : Select your Radius Client

  • Configure the below details to add Radius Client.
  • Client Name: Any name for your reference.
    Client IP: IP address of VPN server which will send Radius authentication request.
    Shared Secret: Security key.
    For Eg. "sharedsecret"
    (Keep this with you, you will need to configure same on VPN Server).
    Include Password & OTP in same Request Check this option for clients which takes password and the OTP in same request. Otherwise keep it unchecked.
    Send Groups in Response Enable this to send user groups as Vendor-Specific Group Attributes.
  • Configure the following Policy details for the Radius Client.
  • Group Name: Group for which the policy will apply.
    Policy Name: Any Identifier that specifies policy name.
    Login Method Login Method for the users associated with this policy.
    Enable 2-Factor Authentication Enables Second Factor during Login for users associated with this policy.
    Enable Adaptive Authentication Enables Adaptive Authentication for Login of users associated with this policy.
  • After configuring the given above details, Click on Save button.
  • Configure OpenVPN App for 2FA Two-Factor Authentication



    NOTE: For On-Premise version follow the below steps before testing the connectivity.

    Only For On-Premise Version

    Step 1: Open Firewall Ports.

  • In order to receive the RADIUS request, it is necessary to open UDP traffic on ports 1812 and 1813 for the machine where On-Premise IdP is deployed.
  • If the hosting machine is a Windows Machine then you can follow this document.
  • If the hosting machine is a Linux Machine then you can follow this document.

  • NOTE: If your machine is hosted on AWS, then enable the ports from the AWS panel.

2. Configure OpenVPN Server

  • Open your OpenVPN Server Admin Dashboard.
  • Select General option under Authentication section.
  • Two-Factor authentication for OpenVPN 2FA/MFA  OpenVPN Server admin panel

  • Select RADIUS and click on Save Settings.
  • MFA 2FA Two-Factor authentication for OpenVPN select Radius and Save

  • Click on Update Running Server in the Pop up that appears.
  • MFA 2FA Two-Factor authentication for OpenVPN Update Running Server

  • Select RADIUS option under Authentication section.
  • MFA 2FA two-factor authentication for OpenVPN Radius Authentication

  • Select the PAP option under Select RADIUS Authentication Method.
  • Configure the following details
  • Hostname or IP Address: For on-premise version: IP of server where IDP(miniOrange) is installed
    For cloud version: Contact us at info@xecurify.com to get the IP
    Shared Secret: Security Key that was configured in miniOrange IDP.
    In step 1 we configured this as "sharedsecret"
    MFA 2FA Two-Factor authentication for OpenVPN configure IP, Shared Secret

  • Click on Save Settings and then on Update Running Server in the Pop up that appears.

3. Configure Your User Directory


  • Log in to miniOrange Admin Console.
  • From the left side menu, click on User Stores >> Add User Store.
  •  2FA: Configure User Store

  • Select User Store type as AD/LDAP.
  •  2FA: Select AD/LDAP as user store

    1. STORE LDAP CONFIGURATION IN MINIORANGE: Choose this option if you want to keep your configuration in miniOrange. If active directory is behind a firewall, you will need to open the firewall to allow incoming requests to your AD.
    2. STORE LDAP CONFIGURATION ON PREMISE: Choose this option if you want to keep your configuration in your premise and only allow access to AD inside premises. You will have to download and install miniOrange gateway in your premise.
    3.  Two-Factor Authentication : Select ad/ldap user store type

  • Enter LDAP Display Name and LDAP Identifier name.
  • Select Directory Type as Active Directory.
  • Enter the LDAP Server URL or IP Address against LDAP Server URL field.
  • Click on Test Connection button to verify if you have made a successful connection with your LDAP server.
  •  MFA/2FA: Configure LDAP server URL Connection

  • In Active Directory, go to the properties of user containers/OU's and search for Distinguished Name attribute.
  •  MFA: Configure user bind account domain name

  • Enter the valid Bind account Password.
  • Click on Test Bind Account Credentials button to verify your LDAP Bind credentials for LDAP connection.
  •  MFA: Check bind account credentials

  • Search Base is the location in the directory where the search for a user begins. You will get this from the same place you got your Distinguished name.
  •  2FA : Configure user search base

  • Select a suitable Search filter from the drop down menu. To use custom Search Filter select "Custom Search Filter" option and customize it accordingly.
  •  MFA/2FA : Select user search filter

  • You can also configure following options while setting up AD. Enable Activate LDAP in order to authenticate users from AD/LDAP. Click on the Save button to add user store.
  •  MFA : Activate LDAP options

    Here's the list of the attributes and what it does when we enable it. You can enable/disable accordingly.

    Attribute Description
    Activate LDAP All user authentications will be done with LDAP credentials if you Activate it
    Sync users in miniOrange Users will be created in miniOrange after authentication with LDAP
    Backup Authentication If LDAP credentials fail then user will be authenticated through miniOrange
    Allow users to change password This allows your users to change their password. It updates the new credentials in your LDAP server
    Enable administrator login On enabling this, your miniOrange Administrator login authenticates using your LDAP server
    Show IdP to users If you enable this option, this IdP will be visible to users
    Send Configured Attributes If you enable this option, then only the attributes configured below will be sent in attributes at the time of login

  • Click on Save. After this, it will show you the list of User stores. Click on Test Configuration to check whether you have enter valid details. For that, it will ask for username and password.
  •  2FA: Test AD/Ldap connection

  • On Successful connection with LDAP Server, a success message is shown.
  • Click on Test Attribute Mapping.
  •  LDAP successful connection

  • Enter a valid Username. Then, click on Test. Mapped Attributes corresponding to the user are fetched.
  •  MFA: Fetch mapped attributes for user

  • After successful Attribute Mapping Configuration, go back to the ldap configuration and enable Activate LDAP in order to authenticate users from AD/LDAP.
  • Refer our guide to setup LDAPS on windows server.


  • Log in to miniOrange Admin Console.
  • Go to Userstore >> Add Userstore.
  •  MFA: Add User Store

  • Select Userstore type as miniOrange and click on Add miniOrange Identity Source.
  •  2FA: Add miniOrange as Idetity source

  • Once done with adding Identity Source, make it default by clicking on Select against the recently added miniOrange Identity Source.
     MFA: Make Identity Source as Default

  • There are 3 ways to add users in miniOrange:
  • 1. Create User in miniOrange

    • Click on Users >> Add User.
    •  VPN 2FA : Add user in miniOrange

    • Here, fill the user details without the password and then click on the Create User button.
    •  MFA: Add user details

    • After successful user creation a notification message "An end user is added successfully" will be displayed at the top of the dashboard.
    •  Two-Factor Authentication: Add user details

    • Click on On Boarding Status tab. Check the email, with the registered e-mail id and select action Send Activation Mail with Password Reset Link from Select Action dropdown list and then click on Apply button.
    •  2FA: Select email action

    • Now, Open your email id. Open the mail you get from miniOrange and then click on the link to set your account password.
    • On the next screen, enter the password and confirm password and then click on the Single Sign-On (SSO) reset password button.
    •  Multi-Factor Authentication: Reset user password
    • Now, you can log in into miniOrange account by entering your credentials.

    2. Bulk Upload Users in miniOrange via Uploading CSV File.

    • Navigate to Users >> User List. Click on Add User button.
    •  2FA: Add users via bulk upload

    • In Bulk User Registration Download sample csv format from our console and edit this csv file according to the instructions.
    •  Two-Factor authentication: Download sample csv file

    • To bulk upload users, choose the file make sure it is in comma separated .csv file format then click on Upload.
    •  2FA : Bulk upload user

    • After uploading the csv file successfully, you will see a success message with a link.
    • Click on that link you will see list of users to send activation mail. Select users to send activation mail and click on Send Activation Mail. An activation mail will be sent to the selected users.

    3. Self User Registration

    • miniOrange self user registration allows end users to register themselves using customized registration form. miniOrange admin users can customize the registration form by adding more custom fields according to their choice. Follow the miniOrange guide to customize user self registration page.

4. User Import and Provisioning

  • Go to Settings in the Customer Admin Account.
  • MFA/Two-Factor Authentication(2FA) for OpenVPN  miniOrange dashboard

  • Enable the "Enable User Auto Registration" option and click Save.
  • MFA/Two-Factor Authentication(2FA) for OpenVPN  Enable User Auto Registration

  • (Optional) To send a welcome email to all the end users that will be imported, enable the "Enable sending Welcome Emails after user registration" option and click Save.
  • MFA/Two-Factor Authentication(2FA) for OpenVPN  Enable sending Welcome Emails after user registration

  • From the Left-Side menu of the dashboard select Provisioning.
  • MFA/Two-Factor Authentication(2FA) for OpenVPN  User Sync/Provisioning

  • In Setup Provisioning tab select Active Directory in the Select Application Drop Down.
  • Toggle the Import Users tab, click on Save button.
  • MFA/Two-Factor Authentication(2FA) for OpenVPN  User Sync Active Directory Configuration

  • On the same section, switch to Import Users section.
  • Select Active Directory from the dropdown and click on the Import Users tab, to import all the users from Active Directory to miniOrange.
  • MFA/Two-Factor Authentication(2FA) for OpenVPN  User Sync Import Operation

  • You can view all the Users you have imports by selecting Users >> User List from Left Panel.
  • MFA/Two-Factor Authentication(2FA) for OpenVPN  User List

  • All the imported users will be auto registered.
  • These groups will be helpful in adding multiple 2FA policies on the applications.

5. Creating User Groups (Recommended)


  • This step involves Importing the user group from the Active Directory and Provisioning them.
  • Go to Provisioning. Switch to Setup Provisioning tab and select Active Directory from Dropdown menu.
  • MFA/Two-Factor Authentication(2FA) for OpenVPN : Select Active Directory (AD)

  • Select Group Provisioning/Deprovisioning tab, and toggle on Import Group option.
  • If you want to dynamically allocate users to the groups present in the miniOrange, then enable "Assign Users to groups"
  • Enter the Base DN for group sync and click Save.
  • MFA/Two-Factor Authentication(2FA) for OpenVPN : Switch on import Group

  • Now switch to Import Groups option and select Active Directory from which you want to import your users.
  • Finally, click on Import button. Your group will be imported.
  • MFA/Two-Factor Authentication(2FA) for OpenVPN : User group imported successfully

    (The Active Directory Group Provisioning (Sync) setup is done. Now, whenever a user is created or modified in LDAP server and if the Assign Users to groups is enabled, then user group attribute from the LDAP server will be automatically synced and the user group will be assigned or changed accordingly in miniOrange.)

  • Select Groups >> Manage Groups from left panel.
  • Click on the Create Group button on the top.
  • MFA/Two-Factor Authentication(2FA) for OpenVPN  Manage Groups

  • Enter an appropriate Group Name and click on Create Group.
  • MFA/Two-Factor Authentication(2FA) for OpenVPN  Create Groups

  • In this guide we have created a Group by name VPN_Group.
  • Assign various members to the group using the Assign User option associated with the group in the groups list.
  • MFA/Two-Factor Authentication(2FA) for OpenVPN  User Assign

  • Select the Users that are required to be assigned to this group. Then Select Assign to Group in Select Action Dropdown and click on Apply button.
  • MFA/Two-Factor Authentication(2FA) for OpenVPN  Assignment to Group

  • These groups will be helpful in adding multiple 2FA policies on the applications.

6. Configure 2FA/MFA for End-Users

  • To enable 2FA/MFA for OpenVPN endusers, go to 2-Factor Authentication >> 2FA for end users.
  • Select default Two-Factor authentication method for end users. You can select particular 2FA methods, which you want to show on the end users dashboard.
  • Once Done with the settings, click on Save to configure your 2FA settings.
  • MFA/Two-Factor Authentication(2FA) for OpenVPN  Configure 2FA Panel

  • Login into your End-User Dashboard using end user login URL.
  • For Cloud Version: The Login URL for end users will be available after setting up Organisation name.
  • (You can follow these steps and use the login URL present in the Branding section.)

    MFA/Two-Factor Authentication(2FA) for OpenVPN Cloud and On-Premise end-users Login URL

  • For On-Premise version: The Login URL will be the same as of Admin Login URL.
  • Select Configure 2FA from left panel.
  • Browse through the Second factor options and choose an appropriate method to be used by the particular End-User during login.
  • For now, we have selected the "OTP OVER SMS"as our 2FA method. You can explore the guide to setup other 2FA methods here.
  • Click on Configure/Reconfigure "OTP OVER SMS".
  • MFA/Two-Factor Authentication(2FA) for OpenVPN  Configure 2FA Panel

  • Enter you Phone Number along with the necessary country code and click on the SAVE below.
  • MFA/Two-Factor Authentication(2FA) for OpenVPN  Configure Second Factor-SMS(Enter Mobile Number)

  • After the Phone details are saved successfully, click on the Save button on the top bar to set this as your 2FA method.
  • Currently used method is represented by green color.
  • MFA/Two-Factor Authentication(2FA) for OpenVPN  Configure Second Factor-SMS(Enter Mobile Number)

  • To use a particular method of 2FA, we configure that method first and then select the method and click on SAVE.
  • Admin can change the second factor of the End user from the User List.
  • MFA/Two-Factor Authentication(2FA) for OpenVPN: User list in miniOrange

  • Under Action Click on Select and then select Reset Second Factor.
  • MFA/2FA Two-Factor authentication for OpenVPN: User list(Reset second factor)

7. Add Another Policy (Optional)

  • Here, we will configure a policy for the User Group that we created in the Step 5 and associate it with the OpenVPN VPN Application.
  • Click on Policies tab >> App Login Policy.
  • MFA/Two-Factor Authentication(2FA) for OpenVPN  App Authentication Policy

  • Click on Add Policy tab.
  • In Application section, select the RADIUS App that we configured earlier in Step 1.
  • Select the required User Group in Group Name and enter the Policy name.
  • In this guide, we will configure a Password Only policy for "VPN_Group", so that only the VPN_Group members can access VPN Services without a Second Factor.
  • Once done with the policy settings, click on Save to Add Policy.
  • MFA/Two-Factor Authentication(2FA) for OpenVPN  App Add Policy

8. Test miniOrange 2FA for OpenVPN Login

  • Connect to OpenVPN by entering the hostname of the server.
  • MFA 2FA Two-Factor Authentication for OpenVPN Enter host name of server

  • Enter your AD username & password and click on Connect.
  • MFA 2FA Two-Factor Authentication for OpenVPN Enter AD username Password and Connect to VPN

  • Now, you are prompted for the 2-factor authentication code. Enter the 2FA code and click on Continue to get access to OpenVPN.
  • Two-Factor Authentication for OpenVPN Enter 2Fa code to connect with VPN

  • After successful validation, you are securely connected to OpenVPN.
  • OpenVPN successfully connected using MFA/2FA Two-Factor Authentication secure login

With the help of this guide you will be able to configure Two-Factor Authentication (2FA/MFA) for OpenVPN Login.


Further References

Our Other Identity & Access Management Products