EvlWatcher!

RdpGuard allows you to protect your Remote Desktop (RDP) from brute-force attacks by blocking attacker's IP address. Fail2Ban for Windows.

A FREE and open source application that allows banning ip addresses from failed terminal services or SQL server logins out of the box. Other types of banning are easily added via an application configuration file.

DDoS Protection tool. Anti DDoS Guardian stops DDoS attacks for Windows servers, it prevents Remote Desktop Connection brute force attacks, Slow HTTP Get&Post attacks, SYN flood, TCP flood, UDP flood, ICMP flood, bandwidth attacks, etc.

lua-spylog - Execute actions based on log records

An autoblocker for brute force attacks primarily for Windows Servers with good information in the admin mils telling you DNS names, country of origin and username used for the attack.