How to Port Forward in Your Router for RealVNC
https://portforward.com/realvnc22.07.2021 · When you use RealVNC you may need to forward ports in your router. A port forward allows incoming connection requests from the internet to go straight to RealVNC. Routers do not generally allow incoming connection requests from the internet. By forwarding a port you can overcome this limitation.
RealVNC - Wikipedia
https://en.wikipedia.org/wiki/RealVNCRealVNC is a company that provides remote access software. The software consists of a server (VNC Server) and client (VNC Viewer) application for the Virtual Network Computing (VNC) protocol to control another computer's screen remotely.