Fail2ban

Fail2ban scans log files (e.g. /var/log/apache/error_log) and bans IPs that show the malicious signs -- too many password failures, seeking for exploits, etc. Generally...

Free Open Source Linux

SSHGuard

SSHGuard monitors services through their logging activity. It reacts to messages about dangerous activity by blocking the source address with the local firewall....

Free Open Source Mac Linux

RdpGuard

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

Commercial Windows

EvlWatcher

Protected against RDP-Brute forcers. It installs a service which scans the event log for anomalies every 30 seconds (by default). When the service finds out that...

• Discontinued
  Website/app unavailable.

Free Windows

Cyberarms Intrusion Detection and Defense System (IDDS)

Windows Server brute force protection for Remote Desktop (including NLA), FTP, SMTP, and much more.

• Discontinued
  Software has been set open-source and abandoned by the main developer. Seems a very good detector but fails to successfully stop attacks. When I have it set to block IPs after 5 failed attempts I shouldn't see multiple entries showing 300 attempts by the same IP addresses.

Free Open Source Windows

Syspeace

Syspeace is an Intrusion Detection and Prevention System (HIDPS) for brute force attacks on Windows Servers.

Commercial Windows

Anti DDoS Guardian

Stops RDP Brute force attack as well as DDoS agaist IIS, FTP, SMTP, and several more.

Commercial Windows

win2ban

win2ban is a Fail2ban implementation for Windows systems. It is a packaging of Fail2ban, Python, Cygwin, Winlogbeat and many other related tools to make it a complete...

Free Personal Windows

SpyLog

Monitor logs from several sources and execute actions based on some rules. Can be used to protecet against brute-force attacks.

Free Open Source Windows