nmap default ports scanned

[TechTrainer11]

When using nmap without the -p option how many ports are scanned?

 

[Michael Stout]

The default ports scanned are 1000 of the ports Nmap believe to be the most important.
The -F scan will scan 100 ports.

Other scanning options would be, using -p include

$ nmap 192.168.0.9 -p80
$ nmap 192.168.0.9 -p0-1023
$ nmap 192.168.0.9 -p22,23,25,110,3389
$ nmap 192.168.0.9 -p0-65535

or my personal faviorite for all 65536 TCP ports

$ nmap 192.168.0.9 -p-

 

[TechTrainer11]

Thank you

 

[precious]

When using nmap without the -p option how many ports are scanned?

Also you can exercise practically with