I'm pretty sure destination NAT is one to one. You would need 2 rules, one for port 1630 and one for port 1631 if you need both redirected.
Edit: Oops, just realized you have 12 ports to 1641. So it would be 12 rules. I could be wrong, but that's what I did for the redirects i need.
Edit: Oops, just realized you have 12 ports to 1641. So it would be 12 rules. I could be wrong, but that's what I did for the redirects i need.
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