Proxy server is a computer that sits between a client computer and the Internet, and provide indirect network services to a client. It may reside on the user’s local computer, or at various points between the user’s computer and destination servers on the Internet.
In a computer network, a proxy server is any computer system offering a service that acts as an intermediary between the two communicating parties, the client and the server. In the presence of a proxy server, there is no direct communication between the client and the server. Instead, the client connects to the proxy server and sends requests for resources such as a document, web page or a file that resides on a remote server. The proxy server handles this request by fetching the required resources from the remote server and forwarding the same to the client.
Types of Proxy Servers
1. Open Proxy
An open proxy is a proxy server that is accessible by any Internet user. Generally, a proxy server only allows users within a network group (i.e. a closed proxy) to store and forward Internet services such as DNS or web pages to reduce and control the bandwidth used by the group. With an open proxy, however, any user on the Internet is able to use this forwarding service.
- Anonymous Proxy
Anonymous Proxy do not hide the original IP address of the user; however, they provide adequate anonymity to most users. Anonymous proxies are easily detectable.
2. Reverse Proxy
A reverse proxy is mostly a server-side concept, and is usually used in the context of CDNs (content distribution networks) for caching static HTTP content. A forward proxy is usually a client side concept used for anonymity, to subvert censorship, and (back in the days of dial-up) as a web accelerator.
Reverse proxies, also known as surrogates, usually receive requests from the Internet and forward them to internal network servers. A reverse proxy server forwards requests to one or more proxy servers, whose response is returned to the client computer, the user of which has no knowledge on the origin of the response.
This type of proxy server identifies itself as a proxy server and also makes the original IP address available through the http headers. These are generally used for their ability to cache websites and do not effectively provide any anonymity to those who use them. However, the use of a transparent proxy will get you around simple IP bans. They are transparent in the terms that your IP address is exposed, not transparent in the terms that you do not know that you are using it (your system is not specifically configured to use it.
Proxy servers are used for several purposes. If it is used as a caching web proxy, it can dramatically improve performance of a web response. When a request is made by a client, a caching proxy returns response directly from its cache if the document already exists. Otherwise, it makes the request to the real server, returns the result, and save it in its cache for later use.
Using a web proxy server allows you to access content on websites that may be blocked or restricted by local governments. It also allows you to surf the web anonymously meaning what you’re browsing cannot be tracked – even by your Internet Service Provider.
A web proxy server works by changing your IP address. So when you connect to the internet we provide you with one of our IP address instead. From then on everything you do online is anonymous as the web proxy shows our IP address, not yours.
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