upnp2mrtg is a simple add-on for the MRTG (Multi Router Traffic Grapher). It can be used to monitor incoming and outgoing bytes of the external interface of the FritzBox DSL router. upnp2mrtg is a command line tool to gather statistics from an upnp enabled FritzBox DSL router. It is a lightweight shell-script for use with MRTG, so no underlying external software (with the exception of netcat) or libraries are required. Using bash-networking instead of netcat is also supported.