about login security code

[a9713030]

today i find my forum some member account have been stolen ,

it there any add-on to add security code when member login to avoid brute force password.

i also want another add-on member's login error password log, try to find which ip try to crack our member's password

--------------- Added [DATE]1309447574[/DATE] at [TIME]1309447574[/TIME] ---------------

i use vbb 3.83