I'm far from an expert here but why aren't you using multi-wan and failover as designed by OPNSense using 2 interfaces?
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Show posts MenuQuote from: EricPerl on May 08, 2025, 11:42:07 PMQuote from: t84a on May 08, 2025, 09:44:09 PMUpdate. Here's the solution thanks to the HomeNetworkGuy:FWIW, this is EXACTLY the same as in reply #3 on this thread...
Quote from: meyergru on May 08, 2025, 03:12:50 PMYou can compare the differences between any of your last configurations yia System: Configuration: History.
What do you mean by "I set it back to Pass All and everything works."? You only showed one firewall rule to that extent here. We were chasing ghosts here if that was not the only rule and you did not have internet access with that.
If it was not the only manual rule on that interface, then please show all interface rules. As I wrote, your first goal should be to enable internet access from all interfaces, then block specific inter-VLAN traffic without losing internet access.