@retrobop your response is not re-assuring and the questions raised by @sirhenrythe5th and me are relevant, since they're related to the legality of your RetroPie usage.
I guess the legality of distributing open source software is no concern to you though. Good bye.

EDIT: I restored the original topic starter, without it the topic replies don't make any sense.

@johnnytwolegs It entirely depends on your network setup.

If you NAS is connected to the internet, then I guess it's a matter of configuring the firewall to allow access to the CIFS ports and making sure that file sharing is enabled for the internet interface. If you have a router in-between, you might need to forward the CIFS ports from the network interface to your NAS box.

Again, a configuration I strongly suggest against, since it exposes your NAS to the internet.

I’ve had great luck using vnc to monitor and control the rpi4 via my iPhone.

@clyde That's it! The KISS principle. I like that one.

@sub_atomic I hope we did not "scare you away" from setting up a remote connection. Just take your time, read up on how to do it properly and you'll be fine.

But doing it together with your nephew is a thing that I can 100% second. Passing on the love for and knowledge of tinkering and a little coding and IT stuff is always something good. :)

Cheers!

@sano said in Unable to Use Hostname to SSH:

You may also use a passphrase and an ssh agent to only have to type the passphrase once per user session ;)

Correct, I had that in mind but didn't articulate it. Thanks for the addition. :)

@adampalmer My suggestion was that you don't have to install RP in a VM on the networked Linux system, I realised that it seemed to recommend to replace the whole PI with a PC - which in itself would not be such a bad idea. Unfortunately most of these systems, while small enough to compare to a RPI, are not in the same price range (Intel NUC or Gigabyte BRIX).
Going back to the original question, I guess you'd need to run an Login DM on the remote system and enable XDMCP and then run X -query <remote_ip> on the Pi, which will present you the login screen of the remote X server and you'll be able to run X11 apps directly from there (see more details at https://wiki.archlinux.org/index.php/XDMCP).

@mitu OHHH MYYY GAWWWD. IT WORKED. Thank you sooooooooooooo much!! I can now do so much more thanks to you!!!

@ectoone I'm certain it wasn't but I will double check and let you know.

Thanks @caver01 and @Spiky, works now.

@derebo pick one or the other. You can't do both

@rascas ah yes, I've done all that - access for the app should be enabled.

Here is my log
https://paste.ubuntu.com/25591065/

@stoney66 said in WinSCP on different network?:

could also setup openvpn...

That was my first thought, too. A vpn would make both networks one, so anything else would work like on the same network.

Thanks for the info.
I knew jstest-gtk. I didn't know it is available via console, too.
I'm gonna test it with a USB gamepad first, to check if it's what I need (I suppose so). NES/SNES controllers test will take a while, since I need to prepare the interconnection board. Maybe I will do a quick test with jumpers.