I need to set up ipnat on QNX 6.3.2

I'm looking for the QNX documentation on the "ipnat format file".

Do you know where I could find it ?

I think it should be quite similar to this FreeBSD documentation :
http://www.freebsd.org/cgi/man.cgi?query=ipnat&sektion=5

Here is the documentation all I was able to find at this point :
- Tutorial on Firewall setting (http://www.qnx.com/developers/docs/6.3.2/neutrino/user_guide/security.html#Firewall)
- Configuration examples (http://www.qnx.com/developers/docs/6.3.2/neutrino/user_guide/examples.html#Firewalls)
- Manual page of the IPNat command line utility (http://www.qnx.com/developers/docs/6.3.2/neutrino/utilities/i/ipnat.
html)