In order to control the request flow in computer networks, a proxy server is used. Proxy Server is a server which acts as an intermediary server between server and clients. The more adaptable and converted attack is Web proxy-based HTTP attack in the existing DDoS attacks. In most of the large-scale official proxies which are usually configured to have high security sometimes cannot avoid being abused for the proxy base attacks. This type of attacks introduces new challenges to the existing security systems of the network.