Proxy

Proxy (Computers, Programming, and Cybersecurity)

A proxy is a technology used in computer networks to form an intermediary between two or more machines. This intermediary is designed to protect and enhance the network infrastructure by providing numerous benefits including security, privacy, speed, and resource savings.

A proxy acts as a gateway between two computers. When a user requests information from a web server, the proxy intercepts the request and forwards it to the server on behalf of the user. The proxy is then responsible for the retrieval of the requested data and relaying it back to the user. Proxies typically include several features such as caching, enhanced security, and data privacy.

In computing, there are many different types of proxies, each of which serve a unique purpose. Commonly used proxies include caching proxies, network proxies, content filtering proxies, and encrypted proxies.

Caching proxies are used to reduce the amount of redundant data traffic flowing through a network by acting as an intermediary between two computers. When one machine requests information from another, the caching proxy will store a copy of the requested data and serve it up to subsequent requests.

Network proxies perform a similar function to caching proxies, but they operate at a higher level of abstraction. Network proxies allow for the modification of requests and responses to maintain compatibility with layers of the network infrastructure.

Content filtering proxies can be used to control access to certain types of data or activities. They allow administrators to block specific content from web servers or to selectively restrict access to certain websites.

Encrypted proxies are particularly suitable for networks that need to protect sensitive data. These proxies can be used to create secure connections between two computers and encrypt traffic passing between them.

Overall, proxies provide an effective way to improve network security, reduce bandwidth, and protect data privacy. They also allow for the flexible and dynamic control of network content.