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Anonymous proxies reveal their identity as a proxy server but do not disclose the client's originating IP address.Open proxies: these forward requests from and to anywhere on the Internet and are accessible by any Internet user.
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There are two basic types of proxy server: Proxies were devised to add structure and encapsulation to distributed systems. This serves as a method to simplify or control the complexity of the request, or provide additional benefits such as load balancing, privacy, or security. Instead of connecting directly to a server that can fulfill a requested resource, such as a file or web page for example, the client directs the request to the proxy server, which evaluates the request and performs the required network transactions. Acting as an intermediary, proxy servers relay your traffic to the destination and send the answer back to you so that the destination server potentially only sees the proxy and not your IP address: Proxies are famous for "anonymity on demand". If the destination server is not using SSL/TLS, then the entire content of traffic is vulnerable as well. Therefore, the internet service provider (ISP) or any man-in-the-middle can see connection details, including the destination IP address.
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Web browser are notoriously known to leak the user's real IP address through WebRTC, browser plugins and a number of other techniques. Configuration an application such as a web browser to reliably use a proxy for all connections is very difficult. Missing leak shield: Proxies don't have a leak shield.
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4.2.2 Links to Software / Provider and Tests.2.2.2 Anonymization Service Feature Comparison.
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