Flickr Photos

Roe Deer
Leopard in the rain
Lion mum taking care of cubs
Male Lion
Lion Cubs Playing
Leopard
Lazy Spotted Hyena
Female Lion
Cheetah
Golden Jackal
Golden Jackal
Young Cheetah

Basics of NMAP basics

NMAP is probably best port scanner and network exploration/security auditing tool what you can find for free.
So here is some really basic things how to use it.

There is many ways to scan with nmap:

Using wildcard mask: nmap 192.168.0.*
Scan’s 192.168.0.0 – 192.168.0.255

With range: nmap 192.168.0.1-100
Scan’s 192.168.0.1 – 192.168.0.100

Using notation: nmap 192.168.0.1/24
Scan’s 192.168.0.1- 192.168.0.255

Find out what operating systems this computer/devices are using:
sudo nmap 192.168.0.* -O

Do ping scan: sudo nmap 192.168.0.* -sP
TCP connect scan: sudo nmap 192.168.0.* -sT
SYN Stealh scan: sudo nmap 192.168.0.* -sS
UDP Scan: sudo nmap 192.168.0.* -sU

Verbose Mode: sudo nmap 192.168.0.* -sP -v
Verbose mode will give you more information about what NMAP is doing.

So if you example want to find DHCP servers from 192.168.0.1 – 192.168.0.255 ip range you can use nmap like this:

nmap -sU 192.168.0.1/24 -p 67-68

It goes thru all IP’s from 192.168.0.1 – 192.168.0.255 and check ports 67 and 68 from every client.

2 comments to Basics of NMAP basics

Leave a Reply

You can use these HTML tags

<a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <s> <strike> <strong>