I have a question on port forwarding. I have configured Google wifi on Verizon FIOS router. I installed pivpn on raspberry pi connected to Google wifi. When I try to add rule in Google wifi, I see input ports and output ports option. Can some one help me understand what these ports are? I configured pivpn using wireguard and I have the port number that was used while configuring.
I was using Verizon router before(Without Google wifi) and port forwarding was very simple and had no issues connecting to the VPN from other networks.
External port is the port that will be opened on Nest Wifi/ your router.
Internal port is the port on the device you are port forwarding for.