What is Nmap?

By | April 3, 2020

What is Nmap

Nmap is an open-source tool for network exploration and security auditing,it used to scan a single host or a large number of the host in the network and to scan the websites or servers

Nmap having a GUI version called ZENMAP It is a multi-platform (Linux, Windows, Mac OS X, BSD, etc.)

Nmap uses raw IP packets to determine what hosts are available on the network, which ports are open and what services that hosts are offering, what operating system they are running, what type of packet filters or firewalls that they are using, etc..  


In the  above, we made a basic scan by typing Nmap command and then the domain name of the target which we want to scan 

It shown the open ports in the target domain and what services they are running  


Nmap provides different types of scan that we will see using Zenmap which is the GUI version of Nmap

Types of  scan present in Zenmap

  • Intense scan
  • Intense scan plus UDP
  • Intense scan, all TCP ports
  • Intense scan, no ping
  • Ping scan
  • Quick scan
  • Quick scan plus
  • Quick traceroute
  • Regular scan
  • Slow comprehensive scan 

This is how Zenmap looks like:


In Target field enter the target name  Ex:nmap.org or or and select the  scan type from the list if you want to add something to the command you can modify the command in the command field  then start the scan , it shows the result after completion of the scan, it the time depends on which scan that you are doing, it  may take from a couple of seconds to up to 5 minutes  

To know more about Nmap you can type man nmap or namp –help in the CMD.

Author: Ravi Sarode, founder of hackersdude.com I am an Ethical Hacker, Web Application Penetration Tester and Security Researcher

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