In this blog, we are going to see how to Create User Groups and configure User Management for RADIUS Authentication in Windows Server 2016 AD

What is Radius:

Remote Authentication Dial-In User Service (RADIUS) is a client/server protocol and software that provides remote access servers to communicate with a central server to authenticate dial-in users and authorize their access to the requested system or service. RADIUS allows a company to maintain user profiles in a central database that all remote servers can share. It provides better security, allowing a company to set up a policy that can be applied at a single administered network point.

Using Radius Authentication method we are going to communicate with Sonicwall Device. Create a Radius Client in the NPS. After creating Radius client, create an NPS Policy to perform authorization.

We are going to configure Radius authentication in SonicOS 6.5, which was released in September 2017. This release includes significant user interface changes and many new features that are different from the SonicOS 6.2 and previous firmware.

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  1. Open AD Users and Computers and create a new group in the user folder
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  3. Create a new user and add as a member for the new user group
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  5. Open the user properties and go to Dial-in users and select Allow access for Remote Access Permission (Dial-in or VPN)
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Configuring the NPS to Support RADIUS Clients

  • Open Network Policy Server from Administrative Tools
  • Right click on the RADIUS Clients folder and click New
  • Enter a friendly name for the client and give IP or FQDN
  • Enter a Shared Secret. This shared secret is needed later, so note this for future reference
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  • Now click Advance tab on the top and select Radius Standard in the Vendor name drop down
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  • Click OK to create the Radius client

To set up the permission for users,

  • Expand Policies and right click on the Network Policies and select New
  • Specify a friendly Network Policy Name and select Connection Type “Remote Access Server(VPN-Dial ap)” and give Next
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  • In Specify Conditions page, click add and select “Windows Group” and click Add Group to add the group which we have created in the beginning
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  • Click Next to specify Access Permission
  • Click Access Granted option and give Next to configure Authentication Methods
  • Click Add and select Microsoft: Secured password (EAP-MSCHAP v2) and give Next
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  • Keep Default in the Configure Constraints page and move on to the next page
  • Pass this Configure page and give Next and review the overall configurations and click Finish

Now we can check Radius Server settings from the Sonicwall Firewall

  • Login to the Sonicwall in configuration mode and go to Manage tab
  • Click Users on the left side pane and select Settings
  • In Settings page, click Configure Radius option
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  • Now click add and enter the radius server details and Shared secret key and save it
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  • After saving the settings move on to the Test tab to test the Radius Server connectivity
  • Select the Radius Server in the drop list and select the authentication method to test
  • Provide valid user account details of the Radius Server and check the connectivity

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Here we have completed the NPS configuration, If all the configurations are correct, the test status will show the result, “Radius Authentication Succeeded”. You can also check the Settings tab to confirm the status of the Radius Server. If it is green, then the communication with the Radius Server is verified and connection is established.

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Configuring RADIUS Authentication in Windows Server 2016 AD – Sonicwall
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