>I think ipfilter doens't work in the 1.5 branch; and from a recent PR it seems
>it's even not there in -current.
>Darren or Itojun could confirm this

	the PR is talking about 1.5 branch.

	for 1.5 branch, IPv6 filtering is not supported (there's two-line code
	to turn this portion off).  see ipf(8) as well.

	on current, IPv6 filtering code is enabled (the two-line code is not
	there), however, we need to run torture tests before we can be sure
	it works right.

itojun