OPNsense VLAN & Gateway Fix

My standalone OPNsense VM is intermittently blocking traffic from the virtual machines that sit on several VLANs. I need someone who already feels at home inside the OPNsense interface to jump in, pinpoint the root cause, and leave me with stable in- and outbound internet access.

What I expect you to do is look at the existing VLAN definitions, trace the packet flow, verify tagging on the parent interfaces, and adjust or create gateways and firewall rules where necessary. At the moment the link comes up, then dies a few minutes later; after a reboot it may work again, so the issue seems to be rule or state related rather than a physical problem.

Deliverables
• Clear written diagnosis of why traffic on each VLAN is dropped.
• Corrected interface, gateway, and rule configuration applied on the VM.
• Final proof: every VM reaches the internet consistently for at least one hour of continuous testing.

Please bring your own favorite troubleshooting tools (packet capture, tcpdump, Wireshark, Flow monitoring) and be ready to share a quick summary of each change so I can learn from the fix.