The Agnitum Firewall Miniport Windows Driver is part of the Agnitum Outpost Firewall software, a security program designed to protect your computer from network attacks, malware, and other security threats. The "Miniport" refers to a virtual network interface created by the firewall for monitoring and filtering network traffic. It allows the firewall to manage the flow of data to and from your computer, ensuring that only safe and authorized connections are allowed.