What Is a Port Scan Attack?
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A port scan attack is a type of cyberattack where hackers scan a computer host’s open ports in order to find security vulnerabilities and gain access to the system. Port scans send messages to each port in order to determine which services the host provides and, ultimately, how to exploit those services. Port scan attacks are commonly employed by malicious actors to gain access to private networks, steal data, and install malicious software.