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Example Nmap output

Nmap Network Scanning

TCP Connect Mode

-p <port_spec>, --dest-port <port_spec> (Target ports)

This option specifies which ports you want to try to connect to. It can be a single port, a comma-separated list of ports (e.g. 80,443,8080), a range (e.g. 1-1023), and any combination of those (e.g. 21-25,80,443,1024-2048). The beginning and/or end values of a range may be omitted, causing Nping to use 1 and 65535, respectively. So you can specify -p- to target ports from 1 through 65535. Using port zero is allowed if you specify it explicitly.

-g <portnumber>, --source-port <portnumber> (Spoof source port)

This option asks Nping to use the specified port as source port for the TCP connections. Note that this might not work on all systems or may require root privileges. Specified value must be an integer in the range [0–65535].

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