I know I have to use a VPN when accessing it away from home. I am not going to expose it in this way. But right now, OPNsense is behind my router, and I just want to learn how to properly configure firewall rules in the setup I have now. Which of the rules I set up are wrong, what other rules should I set up, and are there any other configurations I need to do, so that the firewall works in the way I want?