Portal is the entrance to the meaning in English. Portal authentication is also called Web authentication and a website called Portal authentication portal.
When the user is not authenticated access device forces the user to log into the site, which the user can access the service for free. When users need additional information in the Internet, it must be authenticated in the portal, only after authentication by using Internet resources.
Users can access a known Portal website, enter a user name and password for authentication, Portal authentication start this way is called active authentication. Conversely, if a user attempts to access other external network via HTTP, authentication will be forced to access the Portal site, Portal to start the certification process, in this way is called compulsory certification.
Portal services can provide convenient management for operators, portals can carry advertising, community service, personalized services, broadband operators, equipment providers and content service providers form an industrial ecosystem.
Portal extensions mainly refers to the implementation of patches and anti-virus policies by forcing users to take the initiative to strengthen the defense capabilities of the network against viruses. Specific extensions are as follows: increase in the basis of Portal authentication on the security authentication mechanism, the access terminal can detect whether antivirus software is installed, whether to update the virus database, whether illegal software is installed, whether to update the operating system patches ; permission only to gain access to some Internet resources via user authentication (limited resources), such as a virus server, operating system patch update servers; when the user can access through the security certification after more Internet resources (unrestricted resources )