Set the local IP to the IP address of your server
Local start port should be 3000
Local end port should be 3001
External start port 3000
External end port 3001
I have been having this issue for a few days now. Initially I was able to connect using port 3000. After the 7.2.5 update my server kept showing as offline. If I re-add it as port 3001 it works. So someone reintroduced this bug, or quite simply the documentation is wrong.