A method, non-transitory computer readable medium and global traffic manager computing device for preventing distributed denial of service attack comprising machine executable code which when executed by at least one processor, causes the processor to perform steps including obtaining network information relating to a request in response to receiving the request. A rating is determined for the obtained network information based on one or more network parameters. An action to be taken for the received request is determined based on a comparison of the determined rating and a threshold rating. The determined action is executed for the received request.