Analysis of the Technologies for Host and Port Scanning
Na Fei Zhu, Yue Zhou, Wei Wang, Lou Li · Advanced materials research · 2014
Host scanning and port scanning are the basis for attacking information system. The technologies commonly used in these scans can be classified as ICMP scanning, TCP scanning and UDP scanning. We analyze these technologies and make comparisons among them. Totally, ICMP are mainly used to discover the host, while the TCP and UDP are mainly for port scanning, except for ACK. At the same time, using certain special TCP datagram such as SYN packets and ACK packets, and UDP datagram, we can make a host scanning in a secret manner.