A proxy server is a computer system or an application that acts as an intermediary 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 and the proxy server evaluates the request as a way to simplify and control their complexity. Today, most proxies are web proxies, facilitating access to content on the World Wide Web.
Types of Proxy Servers
There are many different types of proxy servers, but following are some commonly known proxies.
- Transparent Proxy – A transparent proxy is a server that satisfies the definition of a proxy, but does not enforce any local policies. It means that it does not add, delete or modify attributes or modify information within messages it forwards. 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.
- Anonymous Proxy – An anonymous proxy server also known as web proxy, generally attempts to anonymize web surfing by hiding the original IP address of the end user. This type of proxy server are typically difficult to track, and provides reasonable anonymity for most users.
- Elite or High Anonymity Proxy – This type of proxy server does not identify itself as a proxy server and does not make available the original IP address. High anonymity proxies, only include the REMOTE_ADDR header with the IP address of the proxy server, making it appear that the proxy server is the client. This provides the best anonymity because there’s no way to detect them. All the proxies we provide are elite proxies.
A proxy server has a variety of potential purposes, including:
- To keep machines behind it anonymous, mainly for security.
- To access sites prohibited or filtered by your ISP or institution.
- To bypass security and parental control.
- To circumvent Internet filtering to access content otherwise blocked by governments.
- To allow a web site to make web requests to externally hosted resources when cross-domain restrictions prohibit the web site from linking directly to the outside domains.
- To allow the browser to make web requests to externally hosted content on behalf of a website when cross-domain restrictions prohibit the browser from directly accessing the outside domains.
- To speed up the delivery of static web content.