homestead -- 3D real-time network visualiser
http://homestead.sourceforge.net/
Homestead is a 3D real-time network visualizer, displaying hosts and
packet traffic. Features include support for multiple sensors, analysis
of packets to gather hostnames and services, configurable layout of
subnetworks, recording/replaying of packet traffic, and the ability to
filter packets by host, protocol or port. hsen (Homestead Sensor) is
a packet capture daemon which reads and sends packet header information
to Homestead, locally or remotely. hsen also equates hostname to IP by
reading DNS packets (UDP type A class IN standard query response). The
relationship between hsen to Homestead can be one-to-one, one-to-many,
many-to-one or many-to-many (many Homesteads would be on multiple
computers on the same subnet, receiving packet header information from
hsen via broadcast).