"Darkstat uses a very low footprint and the memory, CPU
usage. DarkStat runs in the background of many Cable/DSL routers
and are used in pfSense, redWall opensource firewalls.
Traffic graphs, reports per host, shows ports for each host
Embedded web-server with deflate compression
Asynchronous reverse DNS resolution using a child process
Small, Portable, Single-threaded, Efficient and Uncomplicated"