Skip to main content


Let's look at some way to obtain better output:

  • while in the interactive mode, if we are waiting for results we can press "Enter" and get some lines describing what nmap is doing

  • if we append the --reason in any case nmap is doing a port scan, we'll notice the reason why nmap determined that the examined ports were closed or opened

  • if we are only interested in the open ports, and not even the filtered ones, so we must append --open

  • we can output the results in a file with: "-o", we can save results into different formats:

  • N, normal format

  • X, XML format
  • G, grepable format
  • A, all formats

an example of these could be:

nmap -oN fileName.txt

What I personally prefer in scanning activities is:

nmap -oA filename_prefix