How do I forward a single port with remapping?

[NetGobbler]

Disclaimer:

This is not secure and I know it's not secure, I patch my systems and I have a very complicated password with guest account disabled.


On my old normal ISP TPLink router, I have a rule, to forward an external port, let's call it 44321 to an internal port on my network (3389, RDP) to a single workstation.

That's the only port forward on my network.
When I'm away, I can RDP home.   Yes, I get lots of login attempts in the Windows event log, my password is stupid long and only 1 account is enabled.   I've never been breached in 10 years of doing this.


So I'm trying to replicate this and I can't figure it out.


I'm in a section called FIREWALL: NAT: PORT FORWARD and about half the options make sense to me.

It's asking for a source port range, which I'd assume is  other / other on 44321
Then it's asking for a destination, which I would assume to be, my Windows PC with RDP enabled.

It then asks for a "Redirect target IP" which baffles me?
Regardless I put the same IP in and unfortunately, it doesn't work.

https://i.imgur.com/8Jb8Jul.png

Does anyone know what I'm doing wrong?
(besides trying to do it in the first place, yes I know - see the top line)

[NetGobbler]

I thought FAQ = low priority, frequently asked questions, not me writing a guide, sorry I think this belongs elsewhere.

[Greelan]

Source is any IP and any port, destination is WAN address on port 44321 (or whatever it is), redirect is Windows computer IP on port 3389