hydra

A very fast network logon cracker which support many different services.

Number one of the biggest security holes are passwords, as every password
security study shows.
This tool is a proof of concept code, to give researchers and security
consultants the possiblity to show how easy it would be to gain unauthorized
access from remote to a system.

THIS TOOL IS FOR LEGAL PURPOSES ONLY!

There are already several login hacker tools available, however none does
either support more than one protocol to attack or support parallized
connects.