1 completes the request to the server
2 returns the requested information to the user
3 saves it locally to fulfill future requests
because of this, a proxy can improve internet response and lessen the load on the internet link. for example, suppose a school is using the internet for a research project. a student requests a certain web page, and then sometime later, a second student requests the same page. instead of forwarding the request to the web server where the page resides, the proxy server returns the local copy of the page that it already fetched for the first student.
the problem with a proxy server is that each client must be
configured to support the proxy, which adds to
administration tasks.
if a proxy server is already installed on the lan, instead of configuring each client to point to the proxy server, move it to the wan and enable automatic proxy forwarding. the internet firewall can automatically forward all web proxy requests to the proxy server without client configuration.
as a result, no client configuration is required when a web proxy is used.
the proxy server must be located on the wan; it may not be located on the lan.
click advanced, and then select the proxy relay tab. a window similar to that in figure 47 is displayed.
figure 47 proxy relay window
enter the ip address of the proxy in the proxy web server address box, and the proxy’s ip port in the proxy web server port box.
click update to send the configuration data to the internet firewall.