I have spent the day working through a number of issues with my home network, and one of them leads me to ask this question - should multicast traffic pass between bridged LAN segments?
My UTM is a 4-port PC, with one port assigned to the internet, and the other 3 in a bridge. One port connects an outbuilding, one is for all wireless traffic, and one is for the house. I was trying to get a device in the outbuilding to send traffic to a syslog server in the house, and the Default DROP rule was dropping the traffic, even though they are on the same IP subnet. To try to fix this, I created a firewall rule that allowed any traffic from INTERNAL using any service going to INTERNAL to be allowed, and this fixed that issue. It also allowed my Raspberry Pi's KODI app to successfully discover the same device to obtain some media (that was a new installation today, and it didn't work initially - fixed by this rule though). Is this rule an explicit requirement? i'm ok with that as a fix, just curious if i should need it.
Back to my initial question re multicasting. I would have expected multicast traffic to pass over a bridge, as a bridge just connects separate segments together. Have I missed some config somewhere to make these multicasts pass correctly over this bridge?
Currently running 9.506-2. This has never worked to my knowledge.
TIA
Dave
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