ipmon(8) on FreeBSD
The text 3d93be55c1b8, as FreeBSD 3.5.1-RELEASE, FreeBSD 3.5-RELEASE, FreeBSD 3.4-RELEASE, FreeBSD 3.3-RELEASE, FreeBSD 3.2-RELEASE, FreeBSD 3.1-RELEASE shipped it.
monitors /dev/ipl for logged packets
Flags it lists
-
-F -
-N -
-O -
-S -
-X -
-a -
-f -
-n -
-o -
-s -
-t -
-x