Port Forwarding for Bitcoin Core in order to allow incoming connections? There is a rather good explainer on https://bitcoin.org/en/full-node#port-forwarding on how to do port forwarding for bitcoin core in order to allow incoming connections so as to support the network.
I have followed the instructions, set a fixed local IP for the Mac running bitcoin core and am now trying to configure the router for port forwarding.
Here I am facing the issue that I do not know what to write in the External host field. Please see attached screenshot. I am trying * since I do not know the IP of external host, but this does not seem to be allowed.  The instruction on the above link does not include the detailed configuration that my router requires.
Could anyone please identify what I am filling in wrong in the attached screenshot and suggest how I can change this so that my full node can start allowing incoming transactions?
Many thanks for your time and support!
External host is the IP of the host connecting to you. If you want to allow anyone to connect, you can just put 0.0.0.0.