Abstract: When a gateway server GWS receives an access demand to an IP server from a cellular phone MS via a mobile packet communication network MPN, the gateway server acquires information corresponding to a hostname included in the access demand from a primary conversion table T1. When the obtained information is a wide area IP address, gateway server GWS relays the access demand to a IP server on the Internet INET on the basis of the wide area IP address. When the obtained information is identification of a closed area network, gateway server GWS further acquires a closed area IP address corresponding to the hostname included in the access demand and relays the access demand to a IP server on the basis of the closed area IP address in the LAN corresponding to the identification of the closed area network.

Abstract: Site information on plural Web sites that a user desires is provided without causing a mobile communication terminal to access the plural Web sites. A site information providing device, based on a telephone number received from a mobile phone, extracts user information corresponding to the telephone number from a user information database, extracts a site information ID corresponding to the user information from a site information ID database based on the extracted user information, and extracts site information corresponding to the site information ID from a site information database based on the extracted plural site information IDs. Then, the site information providing device generates a site information list screen based on the plural pieces of extracted site information and transmits it to an address of the mobile phone corresponding to the telephone number.

Abstract: When a gateway server GWS receives an access demand to an IP server from a cellular phone MS via a mobile packet communication network MPN, the gateway server acquires information corresponding to a hostname included in the access demand from a primary conversion table T1. When the obtained information is a wide area IP address, gateway server GWS relays the access demand to a IP server on the Internet INET on the basis of the wide area IP address. When the obtained information is identification of a closed area network, gateway server GWS further acquires a closed area IP address corresponding to the hostname included in the access demand and relays the access demand to a IP server on the basis of the closed area IP address in the LAN corresponding to the identification of the closed area network.