IPBan 2.0.1 Stable | 3.0.0 Beta Portable

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IPBan — free software to block out attackers quickly and easily on Linux and Windows.

Features

Auto ban ip addresses by detecting failed logins from event viewer and/or log files. On Linux, SSH is watched by default. On Windows, RDP, OpenSSH, VNC, MySQL, SQL Server, Exchange, SmarterMail, MailEnable are watched. More applications can easily be added via config file.
Additional recipes for event viewer and log files are here: https://github.com/DigitalRuby/IPBan/tree/master/Recipes
Highly configurable, many options to determine failed login count threshold, time to ban, etc.
Make sure to check out the ipban.config file (formerly named DigitalRuby.IPBan.dll.config, see IPBanCore project) for configuration options, each option is documented with comments.
Banning happens basically instantly for event viewer. For log files, you can set how often it polls for changes.
Very fast — I've optimized and tuned this code since 2012. The bottleneck is pretty much always the firewall implementation, not this code.
Unban ip addresses easily by placing an unban.txt file into the service folder with each ip address on a line to unban.
Works with ipv4 and ipv6 on all platforms.
Please visit the wiki at https://github.com/DigitalRuby/IPBan/wiki for lots more documentation.

Screenshots