10 April 2007 | 14,061 views

DNS Brute Force eXtract – WS-DNS-BFX

Cybertroopers storming your ship?

There is another option for DNS Brute Forcing which uses threads, so may be faster than TXDNS 2.0 which we posted about recently.

What does it do?

This program was written to extract valid hosts of a domain that deny zone transfers.

The program supports:

  • IPv4 => IP Address of 32 bits.
  • IPv6 => IP Address of 128 bits.
  • Multi Thread => Make several resolutions at “the same time”.
  • EMA => Extract more than 1 IP in servers with HA, Network Load Balance, etc, (like: www.yahoo.com, www.microsoft.com).

Where do I use it?

This program must be used against DNS Servers that deny zone transfers.

Example of DNS Servers that deny transfer zones:

How do I compile it?

To compile it, do:

To best performance do:

If u don’t have a compiler (gcc), libs, etc, i added at the .tgz file this program compiled static, called “WS-DNS-BFX-Static”.

How do I use it?

Is easy use this program. Supose that you want extract valid hosts from “yahoo.com”, using dict-file.txt (Brute Force File) and open 4 threads, to do it the command is:

When it finish, will be generated a file called “hosts-yahoo.com.txt” with the extracted hosts.

You can download it here:

DNS Brute Force eXtract


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3 Responses to “DNS Brute Force eXtract – WS-DNS-BFX”

  1. jacob 10 April 2007 at 3:07 pm Permalink

    It seems to me that this tool is only as good as the dictionary file that you’re using. Where can you get a “good” dictionary file?

  2. Darknet 11 April 2007 at 10:39 am Permalink

    jacob: Any good wordlist should be fine, I’ll do a post about where you can find some excellent wordlists in the future. I already have the draft

  3. Arley Silveira 12 April 2007 at 10:32 am Permalink


    TXDNS is multithread since it first release and thus its performance scales to the number of threads you fire.

    TXDNS also support queries not only using (efficiently) wordlist but also applying typo algorithms, rotating TLD and using specific (brute-force) charset-s.

    The beauty lies when you mix those different options and create a powerful and thus revealing DNS Digging attack.

    For good wordlist try checking TXDNS’s download area.

    Cheers and have fun,
    Arley Silveira.