"This feature is by design" Some caveats for this talk: This will not be an exhaustive list. The scope is Architectural and general code quality issues, not bugs. Talking about PF in OpenBSD There have been lots of improvements since I spoke about PF at AsiaBSDCon 2007. (Coincidentally, FreeBSD's PF is from early 2007 - with a couple of bugfixes ported)