NMAP : THE NETWORK MAPPER

Nmap is known as Network Mapper . Nmap is graphical utility for security and network auditing . Nmap uses raw IP packets in novel ways to determine what hosts are available on the network, what services (application name and version) those hosts are offering, what operating systems (and OS versions) they are running, what type of packet filters/firewalls are in use, and dozens of other characteristics. It was designed to rapidly scan large networks, but works fine against single hosts. Nmap runs on all major computer operating systems, and official binary packages are available for Linux, Windows, and Mac OS X.

Features of Nmap are:

• Flexible

• Powerful

• Portable

• Portable

• Well Documented 

  Latest Version of the Nmap can be downloaded from here.

Nmap Installation for Linux systems:

wget https://nmap.org/dist/nmap-7.01.tar.bz2 

bzip2 -cd nmap-7.01.tar.bz2 | tar xvf - 

cd nmap-7.01 

./configure 

make su root 

make install 

 NOTE : "NMAP is Installed in Kali Linux by default "

Nmap also provides the information on supported IP protocols rather than listening ports . It provides the information like targets, reverse dns, operating system, device types and the MAC Address. 

Some Commands:

nmap <--target-->   ( target could be the ip address or the host name of the machine)

nmap -A -T4 <--target-->

nmap -F <-- target -->

NOTE: " These options can be studied from the man page of this command "