Now, I tried to add several rules in OPN sense to prevent blocking this packet (so the default deny rule does not fill my logs for those packets), but impossible. I suspect that when some LAN traffic that goes through that bridge, both OPNSense (in a VM with a virtual interface using that bridge) and the containers see all the packets, weather it's LAN traffic or not.Īnd for some reason, OPNSense drops those packets using the default deny rule, which has no effect to the container because the container still received the packet directly through the bridge. I started observing the issue when I connected a docker container to one of the Linux bridge that is also used by my OPNSense VM.
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