Operation Manual – PortalH3C S7500E Series Ethernet Switches Chapter 1 Portal Configuration1-7For portal authentication, the re-DHCP authentication process is as follows:Step 1 through step 6 are the same as those in the direct authentication/Layer 3 portalauthentication process.1) After receiving an authentication acknowledgment message, the authenticationclient obtains a new public IP address through DHCP and notifies the portal serverthat it has obtained a public IP address.2) The portal server notifies the access device that the authentication client hasobtained a new public IP address.3) Detecting the change of the IP address by examining ARP packets received, theaccess device notifies the portal server of the change.4) The portal server notifies the authentication client of login success.5) The portal server sends a user IP address change acknowledgment message tothe access device.If EAD is supported, the following two steps are also included:1) The security policy server exchanges security authentication information with theclient to check whether the authentication client meets the security requirements.2) The security policy server authorizes the user to access unrestricted resourcesbased on the security configuration for the user. The authorization information isstored on the access device and used by the access device to take control of useraccess.1.2 Portal Configuration Task ListComplete these tasks to configure portal authentication:Task RemarksBasic Portal Configuration RequiredConfiguring a Portal-Free Rule OptionalConfiguring an Authentication Subnet OptionalLogging out Users Optional1.3 Basic Portal Configuration1.3.1 Configuration PrerequisitesThe portal feature provides a solution for user authentication and securityauthentication. However, the portal feature cannot implement this solution by itself.Currently, RADIUS authentication needs to be configured on the access device tocooperate with the portal feature to complete user authentication.The prerequisites for portal authentication are as follows:
