ipnat(8) on FreeBSD
The text 03fbf9c9fecc, as FreeBSD 4.7-RELEASE, FreeBSD 4.6.2-RELEASE, FreeBSD 4.6-RELEASE shipped it.
user interface to the NAT
Flags it lists
-
-C -
-F -
-l -
-n -
-r -
-s -
-v