joomla hardening

http://www.la-samhna.de/samhain/s_download.html

i'm searching on guide how to block brute force on website like joomla or custom php software that have login options

search engine brought me to this

Host Based Intrusion Detection - Samhain

http://www.howtoforge.com/host-based-intrusion-detection-samhain

i'm trying and hope to update later.