Here is a step-by-step guide to setting up a Secure Shell server on Windows 2003 server using Cygwin (A Linux subsystem for Windows).
Link: How to setup the secure shell daemon on a Windows 2003 server
Fail2Ban filter for NinjaFirewall
This article outlines how to add a Fail2Ban filter that detects Brute Force login attacks logged by Ninjafirewall and ban the attacker’s IP address. An example is also given to show how to make this work with caching and proxy services like CloudFlare.