Hi.
I have an Issue with a RUTX08 though I’m certain the same issue would occur with similar devices.
I have setup three different networks each with their own VLAN and IP-range. For some reason I’m still able to get an ICMP echo reply from all of the gateways, no matter from where I ping. ARP-requests are not answered though.
There are no NAT-rules or port forwards set up. Also no network bridges and the likes. The output and forward rules of the networks are all set to either drop or reject but the router doesn’t seem to care. In my humble opinion it shouldn’t happen either way because the VLANs would already separate the networks. Also the Firewall and different IP-ranges should make it impossible to receive an answer.
Is there a way to prevent that? How can this be explained and does it have consequences for network security since the separation of the networks seems to be rather questionable?
Thanks in advance