What is NMAP?

NMAP stands for Network Mapper. It’s a free and open source utility for network exploration and security auditing. Originally written by Gordon Fyodor Lyon and made feature-rich by the open source community, it is the de facto tool for port scanning, host detection, and fingerprinting service and OS.

It 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,
  • Which operating system (and OS version) they are running,
  • What type of packet filters/firewalls are in use,
  • And more.

It was designed to rapidly scan large networks, but works fine with a single host.

The basic syntax of nmap is

nmap [options] target

The target can be host DNS names, IP addresses, CIDR network notations and more.
Running nmap without any options will by default do the

  • Host detection
  • Port scanning using SYN(stealth) scan
  • Reverse DNS resolution
  • Service fingerprinting
root@kali:~# nmap
Starting Nmap 6.46 ( http://nmap.org ) at 2015-07-31 15:21 IST
Nmap scan report for
Host is up (0.00050s latency).
Not shown: 975 closed ports
7/tcp open echo
9/tcp open discard
13/tcp open daytime
17/tcp open qotd
19/tcp open chargen
80/tcp open http
135/tcp open msrpc
139/tcp open netbios-ssn
443/tcp open https
445/tcp open microsoft-ds
1049/tcp open td-postman
1050/tcp open java-or-OTGfileshare
1051/tcp open optima-vnet
1060/tcp open polestar
1086/tcp open cplscrambler-lg
1087/tcp open cplscrambler-in
2003/tcp open finger
3389/tcp open ms-wbt-server
5000/tcp open upnp
5060/tcp open sip
5061/tcp open sip-tls
5080/tcp open onscreen
5357/tcp open wsdapi
5800/tcp open vnc-http
5900/tcp open vnc
MAC Address: B8:CA:3A:8A:23:D7 (Dell)

Nmap done: 1 IP address (1 host up) scanned in 15.75 seconds

About Deepak Devanand

Seeker of knowledge
This entry was posted in Security and tagged . Bookmark the permalink.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s