PORTABLE FIREWALL
A firewall device provides a novel architecture for conducting firewall and other network interface management operations over a wired Ethernet connection. The firewall device includes a first network interface for connecting to a first packet switched network connection that transports packets, a second network interface for connecting to a second packet switched network connection that transports packets, and firewall circuitry configured to perform firewall operations on the packets transported between the first and second network interfaces and being powered entirely through power received through one of the first and second network interfaces over one of the first or second packet switched network connections.