an application program) that acts as a go-between for requests from
clients seeking resources from other servers. A client connects to the
proxy server, requesting some service, such as a file, connection, web
page, or other resource, available from a different server. The proxy
server evaluates the request according to its filtering rules. For
example, it may filter traffic by IP address or protocol. If the
request is validated by the filter, the proxy provides the resource by
connecting to the relevant server and requesting the service on behalf
of the client. A proxy server may optionally alter the client's
request or the server's response, and sometimes it may serve the
request without contacting the specified server. In this case, it
'caches' responses from the remote server, and returns subsequent
requests for the same content directly.
A proxy server has two purposes:
* To keep machines behind it anonymous (mainly for security).[1]
* To speed up access to a resource (via caching). It is commonly
used to cache web pages from a web server.[2]
Fresh proxies
http://groups.google.com/group/fresh-proxies
http://www.tech-faq.com/new-proxies.shtml
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