Wednesday, April 10, 2013

Using nbtscan in Kali Linux / Backtrack to Quickly scan for Hosts Alive

Written by: Pranshu Bajpai | Find Pranshu on Google+ And LinkedIn

'nbtscan' is a quick tool which gives instant results concerning which hosts are alive on your network and replying to netbios queries

Here, I have scanned a Range of IPs to see which ones are up

Notice the '1/24' in the end. It meant that I want to scan all 255 IPs in that range. IPV4 IP address is 32 bit in size, so '1/24' simply means that 'keep the first 24 bits constant and increment the last 8 bits by 1 each time. OR, I could use '1-255'  instead of using '1/24' . Try and see what happens when you use '1/16' instead.

Read more on CIDR Notation to understand this further.


  1. if nbtscan was make for local network, how do i scan some server say ? and will make a result which ip hosts are up in google networks ?

  2. I tried to run nbtscan on kali linux but their was no list of users and a message "sendingto: failed" was displayed at the server address and broadcast address...can anyone help?