ipnat(8) on FreeBSD
The text 26981c84c5e8, as FreeBSD 13.2-RELEASE, FreeBSD 13.1-RELEASE, FreeBSD 13.0-RELEASE shipped it.
user interface to the NAT subsystem
Flags it lists
-
-C -
-F -
-d -
-h -
-l -
-n -
-p -
-r -
-s -
-v