TheHarvester: An Information Gathering Tool

Hi
Today we will discuss how we can use TheHarvester tools which comes inbuilt in Kali Linux and in many leading linux distributions like Backbox

What is TheHarvester?

TheHarvester is a information gathering tools which can gather emails, subdomains, hosts, employee names, open ports and banners from different public sources like search engines, PGP key servers and SHODAN computer database.

Using TheHarvester :-

1. Open terminal of Backbox and type theharvester and press enter 

2. Now there is some option you can use for this tools.

-b = This is used for specifying the search engine you want to use for your finding 

-d = This is used to specifying the domain for which you want to gather the information 

-l = This is used to limit the number of search

-f = This is used for saving the information in an html file.

3. Now lets start using it 

type this is command terminal 

backbox@backox:~$ theharvester -d gmail.com -b google -l 200

here as i specified above i am searching for gmail.com via google search engine and limited the search result to 200 

there are some other option you can use 

-v = This is used to verify the host name via DNS resolution and then it will search for virtual hosts

-n = Perform a DNS reverse query for all the ranges discovered.

-c = Brute force for the domain name.

-e = You can specify a DNS server for use by this 

You can get more information by typing 

theharvester -help

thats all for today hope you enjoyed it 

Regards

Jitendra K Singh & Sooraj Shekhar (Team Computer Korner)

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