Definitions for "Port scanning"
The practice of testing network or computer ports to see if they are open and unprotected. more.
a cracker's attempt to find access channels and weak points in a computer's security by scanning or probing its system ports over the Internet.
An attempt by hackers to find the weaknesses of a computer or network by scanning or probing system ports via requests for information. It can be used by IT professionals as a genuine tool to discover and correct security holes. But it can also be used maliciously to detect and exploit weaknesses.
Typically an automated process now, this involves 'listening' to determine which ports are in active use in a target network or device. In effect, a reconnaissance mission to discover possible points of entry, but not a serious threat in itself.