Worked on the systemd/systemd repository to deliver MAC Authentication Bypass (MAB) support for bridge ports within systemd-network. This feature enables dynamic host unlocking based on MAC addresses, introducing new configuration options and netlink policies to control MAB behavior. The implementation, written in C and leveraging Linux kernel interfaces, ensures that port learning remains active while disabling bridge link-local learning to prevent unintended unlocks or leakage. By focusing on network configuration and systemd integration, the work addressed both security and operational requirements, resulting in a targeted, well-scoped enhancement that aligns with modern network management practices and kernel-level interface standards.