Detailed Explanation of Port Scanning Principles
Overview Port scanning is a crucial step in the information gathering phase and is one of the primary methods for obtaining service information from a target host. Its core relies on the transport layer characteristics of the TCP/IP protocol stack. Common active port scanning can be broadly divided into TCP Scanning and UDP Scanning. UDP Port Scanning Principle Unlike TCP, UDP is a connectionless, stateless protocol, so the information obtained during scanning is relatively limited. ...