ipmon(8) on FreeBSD
The text b8e710bcf7fc, as FreeBSD 5.5-RELEASE, FreeBSD 5.4-RELEASE, FreeBSD 5.3-RELEASE shipped it.
monitors /dev/ipl for logged packets
Flags it lists
-
-D -
-F -
-N -
-O -
-P -
-S -
-X -
-a -
-b -
-f -
-n -
-o -
-p -
-s -
-t -
-v -
-x