We know
I read the paragraph „Firewalls Internet Connection Sharing & Port Forwarding“ in the manual page 22.
I found no „Port Forwarding“ in my router.
What I found was „Port Mapping“.
„Port Mapping“ looks like very similar the „Port Forwarding“ (at least to me) from the Command Ops Manual.
So I have made here a few settings. I don‘t know really what I'm doing.
Is „Port Forwarding“ and „Port Mapping“ the same?