Os fingerprinting tools

Nmap:

• Developer:Fyodor

• It identifies operating system of windows and linux versions

Latest release:Nmap 5.00

Xprobe2

• It is an active  os fingerprinting tool..

• Techniques used : Nmap and other techniques

• Protocol used : ICMP

Function: 

It detects operating system of the remote system

Latest release :Xprobe2 0.3

Pof

• It is a passive os fingerprinting tool.

Function: 

    

  It detects    1. operating system of the target host  

                        2.   Presence of the firewall  

                        3.  Nat use 

                       4.  Existing of load balancers