Dear users, the project and app are in the process of rebranding and are currently unavailable.

What is Radius Server?

A Radius server is a networking protocol used for remote user authentication and authorization. It is used by various organizations and companies to provide secure access to their network resources, such as Internet service providers, universities, and corporations.

The server acts as a central repository for user authentication information, making it easier for network administrators to manage user access to network resources. Instead of configuring individual access rights for each user, the administrator can set up the server to perform these tasks automatically.


The RADIUS server uses encryption to protect user credentials and can provide two-factor authentication for added security. RADIUS is commonly used by ISPs, universities, and corporations to secure and manage user access to their networks. The (Remote Authentication Dial-In User Service) server is used for a variety of purposes, including:

  1. Wireless access control: RADIUS servers can be used to control access to wireless networks, ensuring that only authorized users can connect to the network.
  2. VPN authentication: RADIUS servers are often used to authenticate users who are trying to access a virtual private network (VPN).
  3. Network access control: RADIUS servers are used to control access to networks, ensuring that only authorized users can gain access.
  4. Network monitoring: RADIUS servers can be used to monitor user activity on the network, helping administrators identify suspicious activity or unauthorized access attempts.

Is the RADIUS server still used?

RADIUS servers are still widely used and remain a popular solution for network authentication and authorization. RADIUS has been in use for many years and has proven to be a reliable and secure method for managing user access to networks. Despite introducing newer technologies, RADIUS continues to be widely adopted due to its versatility, scalability, and compatibility with a wide range of network devices and protocols. As long as there is a need for secure and centralized network authentication, RADIUS servers will continue to play an important role in modern networking.

How to set up a RADIUS server

Setting up the server involves the following steps:

  1. Choose a RADIUS server software: There are many server software programs available, ranging from open-source solutions like FreeRADIUS to commercial options like Microsoft NPS. Choose a server software that meets the specific needs of your organization.
  2. Install the RADIUS server software: Follow the software vendor’s instructions to install the RADIUS server software on a suitable server machine. Ensure that the server meets the hardware and software requirements for the chosen server software.
  3. Configure the RADIUS server: This includes specifying the network interfaces the RADIUS server should listen on, setting up user authentication methods, and configuring access controls to restrict user access to network resources.
  4. Create user accounts: Create user accounts in the RADIUS server for each user who needs access to the network. Ensure that each user has a unique username and password, and specify the user’s privileges and access rights.
  5. Configure the network devices: Configure the network devices, such as access points, routers, or switches, to use the server for user authentication. Provide the RADIUS server IP address, port number, and shared secret to the network devices.
  6. Test the setup: Test the RADIUS server setup by attempting to access the network using a test user account. Ensure that the server correctly authenticates the user and grants or denies access to the network resources based on the user’s privileges.
  7. Monitor and maintain the RADIUS server: Regularly monitor the server logs to ensure it is functioning correctly, and perform regular software updates to keep the server secure.

Note: The specific steps for setting up a RADIUS server may vary depending on the server software used, the network environment, and the specific requirements of the organization. It is recommended to consult the software vendor’s documentation for detailed instructions.

Troubleshooting The Server

If the RADIUS server is not functioning properly, there are a few steps that can be taken to troubleshoot the issue. First, check the server’s logs to see if there are any errors or warnings that can help identify the issue. If there are no errors or warnings, try restarting the server. If that doesn’t fix the issue, it may be necessary to configure the server manually.

If the issue persists, it may be necessary to contact the vendor for additional assistance. The vendor may be able to provide additional troubleshooting steps or may be able to provide a patch or update to fix the issue.

Security Considerations for a RADIUS Server

A RADIUS server is a powerful tool, and it’s important to ensure that it is properly secured. This includes ensuring that the server is up to date with the latest security patches, using strong passwords, and enabling two-factor authentication. Additionally, it’s important to ensure that the server is not publicly accessible, as this could potentially allow attackers to gain access to the network.


The RADIUS protocol is an open standard, meaning that there are a variety of alternatives to a RADIUS server. These include TACACS+, which is a proprietary protocol similar to RADIUS, as well as Kerberos and LDAP, which are both authentication protocols.

RADIUS Server vs Active Directory?

RADIUS (Remote Authentication Dial-In User Service) is a networking protocol that provides centralized authentication, authorization, and accounting management for users who connect and use a network service.

Active Directory (AD) is a Microsoft-developed directory service that provides centralized management and organization of resources, including user authentication and authorization for Windows-based computer networks.

In short, RADIUS is a protocol for remote authentication and authorization, while Active Directory is a centralized service for managing user identities and access to network resources.

Is RADIUS a AAA server?

Yes, RADIUS (Remote Authentication Dial-In User Service) is a type of AAA (Authentication, Authorization, and Accounting) server. RADIUS servers are used to manage user authentication, authorization, and accounting for network access.

How can XFA help with Radius Server?

If you’re looking for an authentication and authorization solution for your network, a RADIUS server may be the right choice for you. It’s a powerful and versatile tool that can help you securely manage user access rights and ensure that only authorized users have access to the network.

XF Authenticator (XFA) can help with Radius servers by providing a secure and convenient alternative to traditional password-based authentication. By eliminating the need for passwords, XFA reduces the risk of password-related security breaches and provides users with quick and easy access to the network. With XFA, the unique code generated by the authenticator app on the user’s device is used to verify their identity, reducing the risk of unauthorized access to the network. This can help enhance the security and user experience of a Radius server-based network.