Patent ID: 8713659
Filing Date: 2014-04-29
Classification: H04L

Abstract:
1. A method for allocating an IP address, the method comprising: sending an authentication request message to a client at intervals of a preset duration, wherein the authentication request message is used to instruct the client to re-send authentication information of a user; receiving a response message sent by the client, wherein the response message carries authentication information of the user; sending an authentication message to a server according to the response message, wherein the authentication message carries the authentication information of the user; receiving an authentication reply message sent by the server, wherein the authentication reply message carries information about an authentication domain authorized by the server to the user, wherein the authentication domain comprises a database that can be accessed by the user; determining, according to the authentication reply message, whether the authentication domain of the user is changed; and if the authentication domain of the user is changed, sending an authentication domain change message to the client according to the authentication reply message, wherein the authentication domain change message is used to enable the client to obtain a new IP address according to the authentication domain change message.