A large portion of the indo bangladesh border is covered by the river brahmaputra. These portions of the border has been a potential route of entrance by the bangladeshi immigrants for a long period of time. Pertaining to the inconvenience to get access to these border areas and various risks associated with it, it is not possible to incorporate man based security system. To cope up with this subtle issue, we propose to build a resilient and affordable mitigation system based on IoT and underwater WSN.