Not sure if you were hinting at it already, just in case, you may be interested in the ongoing work with bpfilter [0] which uses ebpf underneath existing xfilte

Not sure if you were hinting at it already, just in case, you may be interested in the ongoing work with bpfilter [0] which uses ebpf underneath existing xfilter rule interfaces. [0] https://lwn.net/Articles/747551/ https://lwn.net/Articles/747551/