In MANET (Mobile Ad hoc NETwork) all nodes will move from time to time. For communication in MANET, there is no domain power to control it. The process of giving IP address to each node is a big deal. So it is harder to take off a collision less transmission. The process of giving IP value to each node is harder. Node in the sense each system in network. In this paper, the author propose an efficacious protocol for successful communication of system in network and also provide a defense mechanism using game theory in network. The protocol will find where the communication failed; it will trace out the IP of failed connection and provide successful connection with valid IP address.