As the nodes are mobile so topology changes frequently that leads to link failure and lack of infrastructure support and resource constraint is the key issue that causes dishonest and non co-operative nodes. As the nodes square measure mobile thus topology changes oft that ends up in link failure and lack of infrastructure support and resource constraint is that the key issue that causes dishonest and non co-operative nodes. There square measure finding a route to destination, new route discovery is initiated. The frequent discoveries result in a lot of network congestion. To avoid this multipath routing protocols are planned to seek out multiple routes to destination and put on to alternate secondary path just in case of route broken and its offer higher routing performance and security. In this developed research paper attempt to compare the performance of two reactive routing protocols for MANETs that is Secure Dynamic Source Routing (SDSR) and Dynamic Source Routing (DSR), on-demand gateway discovery protocol where a mobile device of MANET gets connected to gateway. SDSR using the Intrusion Detection system (IDS) and trust based routing, the performance results are analysed by varying simulation time. Furthermore, all the above mentioned protocols are compared based on several important performance metrics which are packet delivery ratio, end-to-end delay and average energy.