pfctl(8) on OpenBSD
The text 12fcda13c7b2, as OpenBSD 3.0 shipped it.
control the packet filter and NAT subsystems
Flags it lists
-
-F -
-N -
-O -
-R -
-d -
-e -
-h -
-l -
-n -
-q -
-s -
-t -
-v -
-x