What’s proxying, then?
>A. Proxying is the technique of having outgoing requests (eg for web >pages) passed to a ‘proxy server’, which performs the request on >behalf of the original client and then forwards the results. This can >be useful both if the clients can’t be given direct access to the >Internet, and because it allows the proxy server to perform caching >and reduce the external bandwidth needed. FTP, HTTP and gopher are >easy to proxy, given suitable clients. Telnet is virtually impossible >to proxy transparently.