trackpeer is an agent that helps network and
server administrators with tracking their users'
computers. It makes it possible to determine the
MAC addresses of computers over a network, even
when the computers are behind NATed gateways. This
agent is intended to be used by the administrators
who need to identify and locate malicious
computers and virus-infected computers in a
network such as a middle-sized wireless LAN,
public Ethernet jack system, campus, or corporate
network.