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Saturday, September 28, 2013

BACKTRACK 5 R3 : dnsenum

1.  Coming to next good information gathering tool in Backtrack 5 I give the command run details and a sample result by a tool known as dnsenum

First a small Intro about the tool :

DNSenum is a tool that is designed with the purpose of enumerating DNS information about a domain.Then information that one obtain's from this tool is useful for the phase of information gathering when one is conducting a penetration test.Thus the basic purpose of Dnsenum is to gather as much information as possible about a domain. The program performs the following operations:

-  Get the host's addresse (A record)
-  Get the nameservers (threaded)
-  Get the MX record (threaded)
- Perform axfr (ie DNS zone transfer) queries on nameservers
- Get extra names and subdomains via google scraping (google query = "allinurl: -www site:domain")
- Brute force subdomains from file, can also perform recursion on subdomain that have NS records (all threaded)
- Calculate C class domain network ranges and perform whois queries on them (threaded)
- Perform reverse lookups on netranges ( C class or/and whois netranges) (threaded)
- Write to domain_ips.txt file ip-blocks

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2.   So coming to executing the command,once you click the dnsenum available vide the following route :

Backtrack - Information Gathering - Network Analysis - DNS Analysis - dnsenum
you get to see the following screen...
(Click on the image to enlarge)
Now the run syntax for the command is pretty simple that goes like :


(Click on the image to enlarge)
In the above sample run...I have taken a site
(Click on the image to enlarge)


  1. Good information... Thanks for sharing.

  2. Great post! There is some really helpful and interesting information here. Keep up the good work on this blog!
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