Review on Cerber by Jared Stauder

Very easy to use, works great in protecting us from hackers/spammers who try and get through our firewall without paying or using proper credentials (which we are able filter out). I wish it had more advanced features like blocking certain IP addresses that seem too random at times but this seems minor compared with all of its other benefits! Protects against malicious activity by filtering traffic into my network so there's no need to change any settings within Windows Firewall - just let them connect as normal users when needed while protected behind your own proxy server which can be configured via an API call if you run multiple sites / servers off one account.