A multiconfigurable device masking shunt for a network device, preferably, on a secure network having a first mode and a second mode. In the first mode, the shunt cloaks the network device by rendering the network device invisible to upstream and downstream relay devices. During cloaking, the network device's media access control address is substituted with the upstream or downstream relay devices media access control address. In a second mode, the shunt passes inbound and outbound traffic through one of two alternate paths to the secure network from an unsecure network and can monitor such traffic.