Port Scanning Techniques

Peter Kacherginsky
14 min readDec 22, 2008

Port Scanning is a process of identifying listening ports on a networked system. It reveals a wealth of information about the target including running services, operating system, presence of a firewall.


Just as with other reconnaissance techniques, port scanning must be both efficient and reliable in order to be useful. Several techniques were developed to deal with firewalls, intrusion detection systems and other filtering devices while still being able to complete the scan in a timely manner. Today’s arsenal of port scanning techniques…

Peter Kacherginsky

Blockchain Security, Malware Analysis, Incident Response, Pentesting, BlockThreat.net