https://docs.oracle.com/cd/E86824_01/html/E54775/ipnat.conf-4.html
ipnat.conf - man pages section 4: File Formats
ipnat , ipnat.conf - IP NAT file format The ipnat or ipnat.conf configuration files are associated with the Solaris IP Filter feature. See ipfilter (5) .
man pagesconfsectionfileformats
https://www.hostinger.com/support/1583754-are-ipnat-modules-supported-at-hostinger/
Are IPNAT Modules Supported at Hostinger?
Feb 8, 2019 - Ipnat modules on Web, Cloud and VPS hosting plans
modulessupportedhostinger
https://forums.freebsd.org/threads/ipnat-rdr-problem.20227/
ipnat - rdr problem | The FreeBSD Forums
I'm using ipnat with redirection on FreeBSD 8.1 stable. Details are I would like to redirect all traffic destined to port www to another machine, another...
rdrproblemfreebsdforums