Tuesday, February 3, 2009

DNS mining.. Fierce.pl

Ok, so you know those times when you discover that diamond in the rough, the extremely useful yet previously unheard of tool that makes you want to shout to tell the world about it, only to find out that your friends already know... you wonder to yourself, well why the heck didnt' they tell me?
This post is to save the people I know from the aforementioned scneario. Fierce.pl is a perl script (O rly?) that can be used to discover hosts of a target organization simply by performing DNS resolution against a dictionary file. The dictionary file included isn't bad, however I've extended mine by merging with other world lists and gotten better results.

Long story short, fierce is a super handy tool for discovery resources that is lightweight and easy to use. It's been around for a bit, I'm just making sure that you know about it :)

Fierce can be found here
http://ha.ckers.org/fierce/

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