Bruteforcing passwords is worthless I would say.
Unless you're trying to hack some poor guy who doesn't know the importance of a big password (in which case there's probably no advantage for you in doing it) it will be just a waste of your time, you can't bruteforce a password quickly enough locally, nevermind with internet connection, and proxying. By the time you get it the Universe will be over (not a joke or exageration, there are websites where you can check how long it takes in average to crack it, my important passwords are easy to memoryze but I have absolutely no problem giving the hash, you'll never find the password).
So in conclusion I advise you to find the service running in port and trying just the default usernames and passwords, other than that, try to exploit with with some overflow, under run, something...