technology
RADIUS (Remote Authentication Dial In User Service) is a protocol for carrying authentication, authorization, billing (AAA) and configuration information between a network access device and an authentication server. One of the most extensive agreements has the following characteristics.
- Client/Server Architecture
- Using shared keys to secure network transmissions
- Good scalability
- Flexible certification mechanism
The RADIUS protocol is defined by the ISO standard, see the RFC2865 and RFC2866 documents for details.
Portal means entrance in English.Portal authentication is also commonly referred to as Web authentication, and Portal authentication sites are generally referred to as portals.
In a traditional networking environment, users can access devices or resources in the network as long as they have access to LAN devices, and in order to enhance security control and operational management of network resources, in many cases user access needs to be controlled. For example, in some public places, neighborhoods, or company network access points, the provider providing the access service wants to allow only paid legitimate users to access the network, so the provider provides each user with an account and password to access the network. In addition, some companies will provide access to some internal critical resources to external users and expect that only validly authenticated users will be able to access these resources. Existing access control methods, such as 802.1x and PPPoE, require client-side cooperation and can only control user access at the access layer.
Portal authentication technology, on the other hand, provides a flexible access control method that can be implemented at the access layer and at critical data entry points that need to be protected without the need to install clients.