Ways to isolate LAN interfaces...

[alexroz]

I am a complete newbie at Opnsense. It is my first post here.
I have a WAN and management LAN interface.

I need to create several additional LAN (opt1, opt2, optN) interfaces isolated from all others except for a WAN. In other words, I need several LAN interfaces that have internet access but can't access each other.
So far I came across the following solution: https://www.reddit.com/r/OPNsenseFirewall/comments/bm4b6w/outgoing_firewallrules/emweuyc?utm_source=share&utm_medium=web2x&context=3

Is it there any other good solutions for such a "challenge"?

[alexroz]

Just found a "right" solution in the official documentation: https://docs.opnsense.org/manual/how-tos/guestnet.html