Hi there,
It’s not entirely evident from your post, but are you running the server? You need the server to be running (even if it’s a local connection) - if you run it on the computer that’s port forwarded you should be able to connect to it with the other computer using the external IP address (type what’s my ip address into google, and use that ip to connect using the other computer).
If ‘yes’ to the above, have you tried connecting with the other computer using the internal IP address?
open CMD and type ‘ipconfig’ and use the ipv4 address. I’m not sure this will work, but worth a shot.
