'''Fail2ban'''
Is a regex based banning tool that is extremely effective against DOS and Brute force attacks. It is used in conjunction with IPTables to ban malicious requests that match its defined regexs. It can be found [http://www.fail2ban.org/wiki/index.php/Main_Page| here]. Against, Brute Force Password attacks fail2ban is an extremely useful tool. It can be set to ban IP Address that repeatedly attempt to access certain website pages, such as the login or admin pages.