Explore the evolution and current state of bpfilter, a BPF-based packet filtering framework, in this 33-minute conference talk from the Linux Plumbers Conference. Delve into the recent developments of bpfilter as a userspace daemon, now available on GitHub. Learn about its swift and user-friendly interface for generating packet-filtering BPF programs dynamically. Gain insights into bpfilter's current capabilities, performance metrics, and ongoing development efforts. Understand how this framework has progressed from an empty usermode helper to an actively developed tool for efficient packet filtering in Linux systems.