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A proxy server as the name implies acts as a replacement for another computer. It takes over the requests from a client for a web page for example and starts the requests instead of the clients. So the client is hidden for the server. The proxy server additionally can filter for viruses or unwanted content. It can also make the requested sites faster.
In simplest cases the proxy only forwards information. The user does not recognize the existence of it when it runs in transparent mode. The proxy - in most cases a http proxy - only controls the communication between the web browser (client) and the web server. Main functionalities are:
There are proxy servers for several Internet services. The following proxies are part of the Gibraltar firewall software:
Transparent Proxy
A proxy is called transparent if the client does not need to change anything at his client to use the proxy. Additionally it is not possible to bypass the proxy. Requests to the special port (e.g. HTTP proxy to port 80) are redirected to the port where the proxy listens. The user has no possibility to bypass the proxy. All proxies within the Gibraltar software can be run in transparent mode.
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