Except the automatically generated rules, there are 2 rules:
Protocol Source Port Destination Port Gateway Schedule Description
Automatically generated rules
IPv4 * LAN net * * * * * Default allow LAN to any rule
IPv6 * LAN net * * * * * Default allow LAN IPv6 to any rule
The OpenVPN & Floating Rule are the same like IPv4, just with Source any aswell.
Protocol Source Port Destination Port Gateway Schedule Description
Automatically generated rules
IPv4 * LAN net * * * * * Default allow LAN to any rule
IPv6 * LAN net * * * * * Default allow LAN IPv6 to any rule
The OpenVPN & Floating Rule are the same like IPv4, just with Source any aswell.