Question : Help against Brute Force

I am tired of looking at my /var/log/messages and seeing millions of:

...error: PAM: authentication error for illegal user ...

How can I stop these brute force attacks?

Answer : Help against Brute Force

Configure your firewall and use fail2ban:

http://www.freebsd.org/doc/en/books/handbook/firewalls.html
http://lxer.nl/webdevelopment/fail2ban-prevent-bruteforce-attacks/