Traffic analysis and Intrusion Detection System developed by The SANS Institute, The Naval Surface Warfare Center, the Lawrence Berkeley Research Center, and the US Dept of Energy. This package includes tcpdump, tcpslice, libpcap, and the SHADOW code. Check out the Apache web server
You can download it from the following link: https://packetstormsecurity.com/files/download/12671/SHADOW.tar.gz
Source: https://packetstormsecurity.com/files/12671/SHADOW.tar.gz.html