The Multi Router Traffic Grapher (MRTG) is a tool to monitor the traffic load on network-links. MRTG generates HTML pages containing GIF images which provide a LIVE visual representation of this traffic.
You can download it from the following link: https://packetstormsecurity.com/files/download/13291/mrtg-2.7.5.tar.gz
Source: https://packetstormsecurity.com/files/13291/mrtg-2.7.5.tar.gz.html