@WGH_ You're dead - presumably because the profile is new, and immediately made a comment? I think maybe anti-spam is a bit aggressive, unless there's some linked account that accounts for the ban?

At any rate, I agree information on bpf as a iptables work-a-like is scarce. This helps a bit:

https://www.netronome.com/blog/bpf-ebpf-xdp-and-bpfilter-wha...

Then there's of course the kernel docs, eg: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/lin...

See also: https://blog.cloudflare.com/introducing-the-bpf-tools/