Nmap - cross-platform network scan tool

Nmap is a power free network scan tool, it runs on Windows, Mac, Linux with GUI and Command line mode.

• download it from: http://nmap.org/download.html
  • (win) zip version, install the vcredist_x86.exe (MS VC++ lib) in that directory to avoid “dll missing” error.
  • (win) zip version, install “WinPcap-namp.exe” to be able to capture package data

• scan the OS of an IP

  nmap -O 192.168.1.1

• scan machines nearby

  nmap -sP 192.168.1.0-255