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

[BirdOPrey5]

In vBulletin Options -> General Settings check the setting: Use Login "Strikes" System.

This should definitely be enabled. It will prevent all brute strength attacks as it will lock-out anyone who gets the wrong password too many times.

If this was already enabled then it wasn't a brute-strength attack that caused the accounts to be compromised to begin with.