nmap is used to a larger network port scanning tool that can detect the service which TCP / IP port is now open. Users can query the system and to ensure that it is currently open which ports communicate with the outside world, thereby prohibiting should open by running. . .
The windows, for example using nmap
1, install nmap
Download: https://nmap.org/dist/nmap-7.80-win32.zip
Or: https://nmap.org/download.html
Decompression can download, free installation. cmd use.
2, the same network segment to scan all existing machines
nmap.exe -sP 129.120.75.0/24
3, scan all ports
nmap.exe -p 0-65535 129.120.75.70 > myresult.txt
View myresult report.
4, scan the host operating system type
nmap.exe -based 129.120.75.70
5. Other
https://www.cnblogs.com/LyShark/p/10637507.html
https://www.osyunwei.com/archives/2004.html