What does RADIUS stand for?

Radius protocol

There was a need for a protocol that could be adapted to proprietary systems to provide flexibility and compatibility, something that Livingston Enterprises collaborated on first.

The current access control paradigm (AAA) is advancing, while RADIUS is beginning its slow but inexorable decline, despite still being ubiquitous for a long time, thanks to its compatibility.

Moreover, RADIUS is supported by absolutely any NA (Network Access Server) type product, which ensures a long future for it. This includes, for example, strong authentication services or 2FA.

This protocol also has its limitations. It does not support conditional access or de-authentication by itself (unless implemented by hand). It is stateless, which prevents it from maintaining continuity between sessions. Finally, its performance tends to be poor in very large environments.

The RADIUS protocol uses UDP packets (for different reasons, one of them being that UDP is also stateless) and communicates on port 1812, a change from the original RFC, which established port 1645.) This was eventually changed because it interfered with the Datametrics service.

Radius Server

RADIUS (Remote Authentication Dial-In User Service) is an authentication and authorization protocol for network access or IP mobility applications. It uses UDP port 1812 to establish its connections.

One of the most important features of the RADIUS protocol is its ability to manage sessions, notifying when a connection starts and ends, so the user can determine its consumption and bill accordingly; the data can be used for statistical purposes.

RADIUS was originally developed by Livingston Enterprises for the PortMaster series of its Network Access Servers (NAS), later published as RFC 2138 and RFC 2139. Many RADIUS servers exist today, both commercial and open source. Features may vary, but most can manage users in text files, LDAP servers, various databases, etc. SNMP is often used to remotely monitor the service. RADIUS proxy servers are used for centralized management and can rewrite RADIUS packets on the fly (for security reasons, or do conversions between dialects from different vendors).

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Radius port

This mode provides the necessary security for wireless networks in the enterprise world. It is more complicated to configure, and offers individualized and centralized control over access to your Wi-Fi network.      When users try to connect to the network, they need to present their login credentials to the system.

This mode supports 802.1x RADIUS authentication and is suitable in cases where a RADIUS server is used. WPA-Enterprise should only be used when a RADIUS server is connected for client authentication.

Users never deal with the encryption codes. They are created and securely assigned per user session in the background after a user submits their login credentials to the system. This prevents people from obtaining network keys from computers.

Free radius

RADIUS (Remote Authentication Dial-In User Service) is an authentication and authorization protocol for network access or IP mobility applications. It uses UDP port 1812 to establish its connections.

One of the most important features of the RADIUS protocol is its ability to manage sessions, notifying when a connection starts and ends, so the user can determine its consumption and bill accordingly; the data can be used for statistical purposes.

RADIUS was originally developed by Livingston Enterprises for the PortMaster series of its Network Access Servers (NAS), later published as RFC 2138 and RFC 2139. Many RADIUS servers exist today, both commercial and open source. Features may vary, but most can manage users in text files, LDAP servers, various databases, etc. SNMP is often used to remotely monitor the service. RADIUS proxy servers are used for centralized management and can rewrite RADIUS packets on the fly (for security reasons, or do conversions between dialects from different vendors).

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What does RADIUS stand for?
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