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Configuring portal authentication
Overview
Portal authentication helps control access to the Internet. Portal authentication is also called "Web
authentication." A website implementing portal authentication is called a portal website.
With portal authentication, an access device redirects all users to the portal authentication page. All
users can access the free services provided on the portal website. However, to access the Internet,
a user must pass portal authentication.
A user can access a known portal website and enter a username and password for authentication.
This authentication mode is called active authentication. There is another authentication mode,
forced authentication, in which the access device forces a user who is trying to access the Internet
through HTTP to log on to a portal website for authentication.
The portal feature provides the flexibility for ISPs to manage services. A portal website can, for
example, present advertisements and deliver community and personalized services. In this way,
broadband network providers, equipment vendors, and content service providers form an industrial
ecological system.
Extended portal functions
By forcing patching and anti-virus policies, extended portal functions help users to defend against
viruses. Portal authentication supports the following extended functions:
• Security check—Works after identity authentication succeeds to check whether the required
anti-virus software, virus definition file, and operating system patches are installed, and whether
there is any unauthorized software installed on the user host.
• Resource access restriction—Allows users passing identity authentication to access only
network resources in the quarantined area, such as the anti-virus server and the patch server.
Only users passing both identity authentication and security check can access restricted
network resources.
Portal system components
A typical portal system comprises these basic components: authentication client, access device,
portal server, authentication/accounting server, and security policy server.
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