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Fierce - Domain DNS Scanner

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Information gathering is the most crucial part of performing a pen test. What is the process of our pen test is depend on all the information we gathered. So this is very important to collect as much as data before jumping into exploitation stage.

In this post we are going to talk about a very popular DNS scanner tool, the name of the tool is fierce.
Fierce comes pre-installed in Kali Linux and it is very simple to use. 

  • Open the Terminal and type following command to see what fierce can do :
fierce -h
The following screenshot is the help menu of fierce :

  • When we want to do a subdomain scan we use the following command :

fierce -dns example.com -threads 10

The following screenshot is showing the scan result of google.com with threads count 10.


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