simplewall – Simple and powerful Windows Firewall alternative for advanced users

Firewall is the strongest line of defense in the system, also a barrier between the intranet and the extranet (Internet), and protects our computer by controlling the flow of packets in and out and preventing access by illegal users according to rules predefined by the system administrator. The built-in Windows Firewall is not only not powerful enough, but also difficult for the average computer users to configure and maintain (so few people use it). That's why there are many third-party firewall programs like simplewall.