Portal Support For Eap - HP 5500 HI Series Configuration Manual

useful. For example, a service provider can allocate public IP addresses to broadband users only
when they access networks beyond the residential community network.
The local portal server does not support re-DHCP portal authentication.
IPv6 portal authentication does not support the re-DHCP authentication mode.
Cross-subnet authentication
•
Cross-subnet authentication is similar to direct authentication, but it allows Layer 3 forwarding
devices to be present between the authentication client and the access device.
In direct authentication, re-DHCP authentication, and cross-subnet authentication, the client's IP
address is used for client identification. After a client passes authentication, the access device
generates an access control list (ACL) for the client based on the client's IP address to permit
packets from the client to go through the access port. Because no Layer 3 devices are present
between the authentication clients and the access device in direct authentication and re-DHCP
authentication, the access device can directly learn the clients' MAC addresses, and can enhance
the capability of controlling packet forwarding by also using the learned MAC addresses.

Portal support for EAP

Authentication by using the username and password is less secure. Digital certificate authentication is
usually used to ensure higher security.
The Extensible Authentication Protocol (EAP) supports several digital certificate-based authentication
methods, for example, EAP-TLS. Working together with EAP, portal authentication can implement digital
certificate-based user authentication.
Figure 38 Portal support for EAP working flow diagram
As shown in
packets. The portal server and the access device exchange portal authentication packets that carry the
EAP-Message attributes. The access device and the RADIUS server exchange RADIUS packets that carry
the EAP-Message attributes. The RADIUS server that supports the EAP server function processes the EAP
packets encapsulated in the EAP-Message attributes, and provides the EAP authentication result. During
the whole EAP authentication process, the access device does not process the packets that carry the
EAP-Message attributes but only transports them between the portal server and the RADIUS server.
Therefore, no additional configuration is needed on the access device.
NOTE:
• To use portal authentication that supports EAP, the portal server and client must be the IMC portal server
and the iNode portal client.
Only Layer 3 portal authentication that uses a remote portal server supports EAP authentication.
•
Figure 38, the authentication client and the portal server exchange EAP authentication
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