win2ban - Fail2Ban for Windows

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 and ready-to-use solution for brute-force attack protection.

Fail2ban is a generic intrusion prevention system, featuring multiple blocking techniques and preconfigured for a variety of server applications. It operates by monitoring log files for selected entries and running scripts based on them. Winlogbeat reads from one or more event logs using Windows APIs, filters the events based on user-configured criteria, then sends the event data to the configured outputs. Cygwin is a Linux-like environment for Windows. It consists of a DLL (Cygwin1.dll), which emulates substantial Linux API functionality, and a collection of tools.

 Itefix offers access to a virtual customer lab in where you can try our software. At the moment we have 5 hosts (Windows  7,  2008r2, 2012r2, 10 and 2016 ). You can setup any combination of software with full functionality for testing your scenarios. 


Time to next refresh of lab computers: 2 hours 23 minutes
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win2ban - win2ban for Windows


The product is a bundle containing installers for 32- and 64-bit systems.

Quantity is the number of computers to install the product on.


Supported platforms: Vista/2008(R2)/7/8/2012(R2)/2016

win2ban comes as a zip archive containing a Nullsoft Installer package. Unzip the downloaded file and run  the installer :

  1. Click Next at Welcome-page
  2. View license agreement.
  3. Specify an installation location.
  4. Select components to install. You can choose not to install Winlogbeat if there is no need for making eventlog entries available for processing via Fail2ban in your case.
  5. Installation starts and installs Fail2ban and optional Winlogbeat as services (win2ban_fail2ban and win2ban_winlogbeat


Fail2ban configuration files are located at etc/fail2ban. You need to develop/implement your jails according to your needs. The file jail.local is configured with a proper set of default parameters for Windows usage. The file windows-firewall.local in the action.d directory contains ban/unban commands for the Windows firewall. It is also possible to configure the server using commands sent to it by fail2ban-client. A shell environment can be initiated by running win2ban-shell.cmd located at the root of the installation directory See also our FAQs for more examples:


A simple fail2ban example:

Log file tmp/test.log:

Problem: 2018-03-26 22:37:16
Problem: 2018-03-26 22:41:12
Problem: 2018-03-26 22:41:16


File etc/fail2ban/jail.local:

maxretry = 1
findtime = 6000
bantime = 180
banaction = windows-firewall
backend = polling

enabled  = true
filter   = test
logpath  = /tmp/test.log

File etc/fail2ban/filter.d/test.local:

failregex   = ^Problem: <HOST>\s*$
ignoreregex =


Fail2ban log example (var/log/fail2ban.log):

2018-03-26 22:36:42,176 fail2ban.server         [3056]: INFO    --------------------------------------------------
2018-03-26 22:36:42,176 fail2ban.server         [3056]: INFO    Starting Fail2ban v0.10.2
2018-03-26 22:36:42,176 fail2ban.server         [3056]: INFO    Daemon started
2018-03-26 22:36:42,209 fail2ban.database       [3056]: INFO    Connected to fail2ban persistent database '/var/lib/fail2ban/fail2ban.sqlite3'
2018-03-26 22:36:42,212 fail2ban.jail           [3056]: INFO    Creating new jail 'test'
2018-03-26 22:36:42,212 fail2ban.jail           [3056]: INFO    Jail 'test' uses poller {}
2018-03-26 22:36:42,213 fail2ban.jail           [3056]: INFO    Initiated 'polling' backend
2018-03-26 22:36:42,215 fail2ban.filter         [3056]: INFO    Added logfile: '/tmp/test.log' (pos = 761, hash = ab6aa4af41e46cc1dfbb26a99bc80bd0)
2018-03-26 22:36:42,216 fail2ban.filter         [3056]: INFO      maxRetry: 1
2018-03-26 22:36:42,216 fail2ban.filter         [3056]: INFO      encoding: UTF-8
2018-03-26 22:36:42,217 fail2ban.actions        [3056]: INFO      banTime: 180
2018-03-26 22:36:42,217 fail2ban.filter         [3056]: INFO      findtime: 6000
2018-03-26 22:36:42,220 fail2ban.jail           [3056]: INFO    Jail 'test' started
2018-03-26 22:37:28,483 fail2ban.filter         [3056]: INFO    [test] Found - 2018-03-26 22:37:12
2018-03-26 22:37:28,483 fail2ban.filter         [3056]: INFO    [test] Found - 2018-03-26 22:37:16
2018-03-26 22:37:29,220 fail2ban.actions        [3056]: NOTICE  [test] Ban
2018-03-26 22:40:16,358 fail2ban.actions        [3056]: NOTICE  [test] Unban
2018-03-26 22:42:07,750 fail2ban.filter         [3056]: INFO    [test] Found - 2018-03-26 22:41:12
2018-03-26 22:42:07,750 fail2ban.filter         [3056]: INFO    [test] Found - 2018-03-26 22:41:16
2018-03-26 22:42:07,766 fail2ban.actions        [3056]: NOTICE  [test] Ban
2018-03-26 22:42:07,891 fail2ban.actions        [3056]: NOTICE  [test] Ban
2018-03-26 22:44:13,826 fail2ban.actions        [3056]: NOTICE  [test] Unban
2018-03-26 22:44:18,041 fail2ban.actions        [3056]: NOTICE  [test] Unban
2018-03-27 00:01:10,808 fail2ban.server         [3056]: INFO    Shutdown in progress...
2018-03-27 00:01:10,808 fail2ban.server         [3056]: INFO    Stopping all jails
2018-03-27 00:01:10,808 fail2ban.filter         [3056]: INFO    Removed logfile: '/tmp/test.log'
2018-03-27 00:01:11,245 fail2ban.jail           [3056]: INFO    Jail 'test' stopped
2018-03-27 00:01:11,245 fail2ban.database       [3056]: INFO    Connection to database closed.
2018-03-27 00:01:11,245 fail2ban.server         [3056]: INFO    Exiting Fail2ban
2018-03-27 09:00:07,232 fail2ban.server         [3692]: INFO    --------------------------------------------------


If you have selected to install winlogbeat, it can be configured via winlogbeat/win2ban.yml. By default it is configured to output event log entries last 72 hours from application, system and security eventlogs, to the logfile winlogbeat\logs\eventlog with the following format:

string: '%{[@timestamp]} %{[event_id]} %{[message]}'

 example output:

2018-03-24T10:22:09.000Z 1704 Security policy in the Group policy objects has been applied successfully.


 Some good references for fail2ban/winlogbeat usage: 

Official Fail2ban Website

Man pages: fail2ban    jail.conf    fail2ban-client    fail2ban-regex    fail2ban-server - Use Fail2ban to Secure Your Server

 Winlogbeat reference



 This package contains components with following terms of licensing:


Component Product Licensing
Fail2ban 0.10.4 Fail2ban license Source code for Duplicity is available here.
Python 2.7.14 Python license
Cygwin and GNU tools 2.11.1 CYGWIN license Source code for Cygwin and GNU Tools are available here.
Elastic Winlogbeat 6.4.2 Winlogbeat license


Itefix EULA