The fail2ban suite is a very useful tool in the battle against brute force login attempts. Where it’s capabilities broke down for me, however, was in addressing repeat offenders. This post includes a configuration to permanently block repeat offenders using the iptables firewall.
The procmail utility filters e-mail as it’s received (generally on a UNIX-like server), rather than when you retrieve it with your e-mail client (such as OSX Mail, Mozilla Thunderbird, Microsoft Outlook, etc). As with most UNIX-based utilities, procmail is a very powerful tool for those that take the time to learn how it can be… Continue reading Ultimate procmail Recipe