One aspect of the present invention will provide a gateway apparatus being able to communicate with a user terminal and provide the user terminal with a GBA authentication between the gateway apparatus and an authentication server, comprising, a receiving unit operable to receive a HTTP request addressed to a network address of the gateway apparatus from the user terminal, a requesting unit operable to request an GBA authentication to the authentication server according to the reception of the HTTP request, and a transmission unit operable to transmit the HTTP request, after the GBA authentication, to the authentication server using a network address of the authentication server preliminarily received from the authentication server.