This is iperf3, a tool for measuring Internet bandwidth performance. iperf3 should work on Linux, FreeBSD, and Mac OSX Prerequisites: libuuid: this is not installed by default for Debian/Ubuntu Systems to install: apt-get install uuid-dev To build, just type 'make' (or 'gmake' on FreeBSD) For more information see: http://code.google.com/p/iperf/ Note that iperf3 is NOT backwards compatible with iperf2.