Port scanning is one of the most popular forms of reconnaissance ahead of a hack, helping attackers determine which ports are most susceptible. In this article, we explain what port scanning is, the different types of port scanning, and how to protect yourself from attackers using port scanning to gain access. It also has legitimate uses in managing networks. It’s important to note that port scanning is not solely used for nefarious purposes. Port scanning is one of the most popular techniques attackers use to discover services they can exploit to break into your computer system, according to the SANS Institute. Ports are points at which information comes and goes from a computer, so by scanning for open ports, attackers can find weakened pathways with which to enter your computer. Much like car burglars test door handles to see which cars are locked, a port scan is a process which identifies “open doors” to a computer.
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