“Interpreting Network Traffic” takes a look at modern reconnaissance activity from the viewpoint of the intrusion detection analyst. The author introduces general principles of network intrusion detection, and explains the basics of a TCP connection through its representation in TCPDump format. He then dissects specific network events in TCPDump format, including scans, third party effects of SYN floods, and load balancing systems. He also presents an argument to refute the existence of “reset scans.”
You can download it from the following link: https://packetstormsecurity.com/files/download/11448/intv2-8.pdf
Source: https://packetstormsecurity.com/files/11448/intv2-8.pdf.html