What is an Anonymous Proxy Server? Anonymous proxy server is a routing communications between your computer and the Internet that can hide or mask your unique IP address to prevent unauthorized access to your computer over the Internet. An IP address is your computer's digital ID while you are online. By masking your IP address, it helps pervent other web sites that can gain access and gather personal information about you through your unique IP address. Any anonymous proxy server can diquise your online ID by using its own IP address in place of yours in every outgoing request. Therefore, helping protect your privacy while you are online.