FreeBSD implements and manages mandatory access controls (MAC) using the TrustedBSD MAC Framework. The framework provides a flexible and extensible architecture for enhancing system security by enforcing various security policies. Here is an overview of how FreeBSD implements and manages MAC:
Framework Overview
The TrustedBSD MAC Framework is a security extension for FreeBSD that allows for the implementation of various MAC policies. This framework provides hooks at critical points in the operating system to enforce access control decisions made by different MAC modules.