Research on Port-Scanning and Anti-Scanning Technology
XU Fang-song · Journal of Nanjing Institute of Posts and Telecommunications · 2005
Scanning a port of the target system is the first step that network intruders will do before entering the system.With technical advancement,more and more port-scanners have been generated.The port-scanner that can not only process common port scanning but also run secret port-scanning has led to great damages to network security.In this paper,all kinds of popular port-scanning technology and its characteristics is discussed at first,and then the technique of secret port scanning based on the leisure computer system is closely analyzed.Based on the study of port-scanning and anti-scanning technology,we propose an improved scheme to defense the port-scanning based on the leisure computer system.Finally,we present particular implementation strategy and experiment results.The improved strategy can defense both common port-scanning and the secret scanning with the symbol of SYN.