A communication system comprising: a first access point configured to communicate with a terminal apparatus, the first access point being an access point to which the terminal apparatus is permitted to connect without any authentication process; a second access point configured to communicate via a network; an authentication unit configured to transmit an authentication screen for inputting authentication information to the terminal apparatus, in response to access from the terminal apparatus, where the authentication information is inputted to the authentication screen by the terminal apparatus; a connection guiding unit configured to connect communication made from the terminal apparatus via the first access point and addressed to any destination, to the authentication unit; a display unit (312, 322) configured to display, at a second terminal apparatus, the authentication information input to the authentication screen and output by the terminal apparatus that has been connected to the authentication unit by the connection guiding unit and to which the authentication screen has been transmitted; an input unit (311, 321) configured to receive user input at the second terminal apparatus, wherein the communication system further comprises a connection control unit configured to permit connection of the terminal apparatus to the network via the second access point in accordance with the user input received by the input unit at the second terminal apparatus according to display by the display unit, wherein the terminal apparatus cannot communicate with the network through communication via the first access point, wherein when the terminal apparatus has been authenticated, the connection control unit is configured to generate a connection information file containing connection information to be used by the terminal apparatus to connect to the second access point, and to transmit a URL indicating the location of the connection information file on the network to the terminal apparatus via the first access point, in response to receiving the URL, the terminal apparatus is configured to request in accordance with the received URL, via the first access point, the connection control unit to provide the connection information file, and in response to the request, the connection control unit is configured to transmit the connection information file to the terminal apparatus via the first access point. a first access point configured to communicate with a terminal apparatus, the first access point being an access point to which the terminal apparatus is permitted to connect without any authentication process; a second access point configured to communicate via a network; an authentication unit configured to transmit an authentication screen for inputting authentication information to the terminal apparatus, in response to access from the terminal apparatus, where the authentication information is inputted to the authentication screen by the terminal apparatus; a connection guiding unit configured to connect communication made from the terminal apparatus via the first access point and addressed to any destination, to the authentication unit; a display unit (312, 322) configured to display, at a second terminal apparatus, the authentication information input to the authentication screen and output by the terminal apparatus that has been connected to the authentication unit by the connection guiding unit and to which the authentication screen has been transmitted; an input unit (311, 321) configured to receive user input at the second terminal apparatus, wherein the communication system further comprises a connection control unit configured to permit connection of the terminal apparatus to the network via the second access point in accordance with the user input received by the input unit at the second terminal apparatus according to display by the display unit, wherein the terminal apparatus cannot communicate with the network through communication via the first access point, wherein when the terminal apparatus has been authenticated, the connection control unit is configured to generate a connection information file containing connection information to be used by the terminal apparatus to connect to the second access point, and to transmit a URL indicating the location of the connection information file on the network to the terminal apparatus via the first access point, in response to receiving the URL, the terminal apparatus is configured to request in accordance with the received URL, via the first access point, the connection control unit to provide the connection information file, and in response to the request, the connection control unit is configured to transmit the connection information file to the terminal apparatus via the first access point.