Reconnaissance using Nmap Part -1




Reconnaissance using Nmap

 

 What is Nmap ?

  Nmap (Network Mapper) is a security scanner originally written by Gordon Lyon (also known by his pseudonym Fyodor Vaskovich) used to discover hosts and services on a computer network, thus creating a "map" of the network. To accomplish its goal, Nmap sends specially crafted packets to the target host and then analyzes the responses.

Features :

  • Host discovery – Identifying hosts on a network. For example, listing the hosts that respond to TCP and/or ICMP requests or have a particular port open.
  • Port scanning – Enumerating the open ports on target hosts.
  • Version detection – Interrogating network services on remote devices to determine application name and version number.
  • OS detection – Determining the operating system and hardware characteristics of network devices.
  • Scriptable interaction with the target – using Nmap Scripting Engine (NSE) and Lua programming language.