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I had the same issue but I have it working now.
I have OPNsense setup with a trunk and vlan sub interfaces. As mentioned elsewhere I needed to create an assignment for the physical interface, then within the interfaces screen for the physical interface I set interface to enabled, I left the Configuration Types as None and enabled Promiscuous mode.
I then went to Service / Intrusion Detection / Administration and enabled the service, turned on IPS Mode and left promiscuous mode as off (as it is now set on the physical).
Since doing this the firewall and IPS has been stable
Hope this helps
I have OPNsense setup with a trunk and vlan sub interfaces. As mentioned elsewhere I needed to create an assignment for the physical interface, then within the interfaces screen for the physical interface I set interface to enabled, I left the Configuration Types as None and enabled Promiscuous mode.
I then went to Service / Intrusion Detection / Administration and enabled the service, turned on IPS Mode and left promiscuous mode as off (as it is now set on the physical).
Since doing this the firewall and IPS has been stable
Hope this helps
