Reading this really renewed my appreciation for the sophistication and ease of use of pf(4) and related networking utilities in OpenBSD. What a tremendous amount of work has been done in 30 years!
I suppose the next generation of the idea is the Berkeley Packet Filter by Van Jacobson: https://www.tcpdump.org/papers/bpf-usenix93.pdf . I read this awhile back but didn't realise it was the descendent of Mogul's work.
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[ 3.7 ms ] story [ 22.3 ms ] threadhttps://man.openbsd.org/pf