Proxy servers are middlemen in the communication between two computers. The proxy server receives requests on behalf of the user and then passes them on accordingly. Why you might need a proxy server and what a proxy server is, you can read in this practical tip. You will come across the term "proxy server" again and again when surfing the Internet. We explain what a proxy server is. A proxy server is a communication mediator in a computer network. It uses its own address to forward requests (from the DNS client), for example to call up a website or to download a file, to the corresponding recipient (server), without both having to be directly connected to each other. A visual comparison would be, for example, the waiter in a restaurant where you place your order: He accepts your request and forwards it to the kitchen without you having to contact the cook personally. In the same way, your answer, i.e. the ordered dish, is delivered to you. With a proxy server, you can not only have your network communication filtered and cache data, but also surf the Internet anonymously. These three options are explained in more detail in the next section.