Detect the Operating System of Victim machine using Nmap written By dubizubi

How    to  Detect  the  Operating  System  of  Victim machine  using Nmap.

Nmap is a one of the  powerful tool  that   can tell you  which   OS  is  using  your   victim  machine. By using  Nmap  we  can  also  find  that which  services  are running on  target  machine .  I  am   writing  this  tutorial  to  tell  you that  how can  we    find  the  OS  of  target  machine .

Requirements:

• Nmap (graphical version is Zenmap)

In kali Linux it is pre installed .
I am using MAC OSX and I have installed Nmap on it. if you want to know more about Nmap then visit (nmap.org).


Steps to find the OS of target.
1. Open the terminal type Nmap command to view the help . Actually from this help page you can read yourself because there's so many options you can use to perform your scanning technique.

2. Simple and basic technique of scanning. Just enter command Nmap <target IP address>

3.     Now we use Nmap --script smb-os-dicovery.nse 192.168.xxx.xxx . we can also use Nmap -O <target ip>.

If you see the Nmap help, there's so many switch you can use but in this tutorial I will not describe all of that switch because you can read more on Nmap official website help page.

-v : Increase verbosity level (use -vv or more for greater effect)
-S <IP_Address> : Spoof source address -- used to trick the firewall/IDS
-e <iface> : Use specified interface
-Pn : Treat all hosts as online -- skip host discovery
-sV : Probe open ports to determine service/version info -- very useful to get detailed information about the service
-T<0-5> : Set timing template (higher is faster)--see picture below
-O : Enable OS detection





if you need any other help then follow me on twitter

twitter.com/octane20077
Thanks
regards Zubair shahzad Arain (dubizubi)
happy hacking