UltraVNC

Hi! (Thank you!)
Messed around for some time with various tests. (with other configurations / switching to another computer that worked with a different IP, etc.
Finally I was able to reach the desired computer.
Don't know what became the final working solution, but now it works.

Now I try to ...

Any suggestions on what could be wrong?
It didn't seem to be a problem to connect from this computer to another computer with ultra VNC.

Hi!
Have installed ultra VNC on several computers in the same local network. Three of the computers are identically similar (Windows 7).
Two of the computers I can reach both locally and externally (ie no problems).

But the third computer can't even be accessed locally with ultra VNC.
No problem ...

I'm installed and running UltraVNC outside the VM.
(Is it possible to install och run UltraVNC inside the VM?)

Is this the service https://account.dyn.com/ you mean?
Can you explain a bit more?
Does it really solve the difficulty of CGNAT?

Hi!
How to use UltraVNC if the computer I want to control has an IP from DHCP?
(the IP is real - but can be changed)

How to use UltraVNC if the computer I want to control has an IP from CGNAT?
(An IP - from the provider (DHCP?) - the provider has an internal (usually unknown ip) - and a local IP ...

Hi!
I have two computers (Comp1 and Comp2)
Comp1 has Oracle VM VirtualBox installed and ( Win10 ).
Comp2 only has Win10
Installed UltraVNC 1.4.3.6 on both computers. (no problem)
Both are on the same local network.
No problem running UltraVNC viewer.
I can control comp2 from comp1 without problem ...