1. A method of operating a mobile router installed in a vehicle; said vehicle comprising a vehicle network bus coupled to a plurality of electronic control units; said mobile router comprising: a wireless wide area network interface a wireless local area network interface; an interface to said vehicle network bus coupled to vehicle electronic control units; a processor; and an intrusion detection program executable by said processor; said method comprising: monitoring data on said vehicle network bus; utilizing said intrusion detection program to detect one or more anomalies in said monitored data; and generating an alert upon detection of said one or more of anomalies.