SELinux Firewall SELinux Firewall is a complete security solution built on top of SELinux. It enhances traditional firewall mechanisms by integrating Mandatory Access Control (MAC) policies with network security features. Unlike conventional firewalls that operate primarily at the network layer, SELinux Firewall functions as an application-level firewall, incorporating proxy servers to manage common application protocols securely. Key Features of SELinux Firewalls Mandatory Access Control (MAC): Unlike discretionary access control (DAC), which relies on user permissions, SELinux enforces strict policies that cannot be altered by regular users or compromised applications.