Abstract: It is well known that IoT (Internet of things) devices are vulnerable and can be easily intruded by attackers. However, traditional protection methods for PCs are no longer suitable for IoT devices. In this work, we design a router-based lightweight defense framework WRGuardian (wireless router guardian) which uses the router's network traffic controllability and computing capacity to protect IoT devices. It will monitor and block the attack behaviors to IoT devices, and it will detect and fix the security issues by simulating attacks. Because there is no requirement of additional security hardware for the IoT devices, this protection framework has a low cost, and it is convenient to deploy and beneficial for promotion. Our experimental results show that WRGuardian is feasible and protects IoT devices from main attacks. It is an effective lightweight solution.

Key words: wireless router, IoT device, protection, network traffic