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Old 08-27-2008, 04:03 AM   #42 (permalink)
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Originally Posted by paynet2128 View Post
What is meant by "If using a proxying firewall, ensure that the proxy is transparent"?
An intercepting proxy (also known as a "transparent proxy") combines a proxy server with a gateway. Connections made by client browsers through the gateway are redirected through the proxy without client-side configuration (or often knowledge).

Intercepting proxies are commonly used in businesses to prevent avoidance of acceptable use policy, and to ease administrative burden, since no client browser configuration is required.

It is often possible to detect the use of an intercepting proxy server by comparing the external IP address to the address seen by an external web server, or by examining the HTTP headers on the server side.
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