Controlled communications over a global computer network

A system for controlling message transmissions between a user machine and a global computer network including the Internet, comprising:

• a proxy server in communication with the user machine and the global computer network, said proxy server including a first port for receiving messages from the user machine;
• and
• a communications network interconnecting the user machine and said proxy server;
• wherein said proxy server receives at least a first message from the user machine, said first message including at least a first data packet having a number of fields including a first field related to a first destination address, with said first destination address being associated with a web site accessible over the Internet, said proxy server ascertaining whether said first message is to be directed to the Internet, said message being sent to a control program of said proxy server when said message is directed to the Internet, said proxy server control program determining whether said message is to be permitted to be sent to said first destination address, wherein said proxy server returns at least one web page having information accessible over the Internet, using said source, which is different from a web page having information available over the Internet using said first destination address.

A method f or controlling communications between a user machine and a global computer network including the Internet, comprising:

• inputting a first destination address using a web browser that is operating on a user machine, said first destination address being associated with at least a first web page having first information accessible using the Internet;
• receiving said first destination address by a proxy server;
• changing by said proxy server said first destination address to a second destination address associated with second information;
• and
• providing said second information to said user machine before providing said first web page having said first information to said user machine.

A method related to controlling communications between a user machine and a global computer network including the Internet, comprising:

• providing a user machine that can operate with a browser involved with enabling communications by said user machine over the global computer network, said user machine being normally configured for a first intranet network;
• connecting said user machine to a second intranet network different from said first intranet network;
• inputting a first destination address using said browser after said connecting step, said first destination address being associated with a first web site having first information accessible using the Internet;
• providing a second destination address associated with a second web site accessible using the Internet while said user machine is connected to said second intranet network, said second web site having second information different from said first information, said second information including at least one of:
• logging in information and advertising information, said providing step being conducted using a proxy server responsive to said user machine;
• and
• sending said second information to said user machine.