![]() Netcat can listen to the specified TCP port. In the following example, we will scan the port range from 1 to Another useful feature of netcat is acting as a TCP server. The verbose mode can be also used for banner grabbing purposes. There is an option -v that will produce more detailed information. Silent mode is the default mode which means only open ports will be printed to the console. In the previous example, we have scanned our host in a silent mode. Make the IP scan faster with the -n option. In this example, we will scan IP address The port range is specified as The screenshot shows detailed output only port 22 is open as we can see. We will use -z options for a port scan like below. The advantage of netcat is simplicity and no library dependency. Netcat can provide port scan functionality. Nmap is one of the most popular tools to find open ports. Penetration testers generally use port scan techniques for information gathering. Help and information about these options can get or printed with the -h option like below. Netcat can listen or connect specified sockets easily. ![]()
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