A method for implementing an Internet of Things security appliance is presented. The method may include intercepting a data packet sent from a server to a client computing device. The method may include performing a security check on the data packet using security modules. The method may include determining the data packet is not malicious based on the security check. The method may include determining a shadow tester to test the data packet based on a type associated with the client computing device. The method may include creating a virtualization environment of the client computing device using the shadow tester. The method may include analyzing behaviors associated with the data packet within the virtualization environment using detection modules. The method may include determining the behaviors do not violate a behavior policy associated with the client computing device. The method may include transmitting the data packet to the client computing device.