IP's in question - CPF Access Denied - good or bad?

I am noticing 2 IP’s coming IN on ICMP that are denied access. The first is and the second is I am not aware of these IP’s being internally based like the 192.168 #'s. Should I allow them or not? They do seem to be persistant, frequent and long running. I don’t seem to be having any problems… OK major problems but am curious. TIA

The is for multicast. Are you sure it’s ICMP? It should be IGMP…
It’s for streaming audio/video on your network. In my router I can turn it on or off. I have it on, and I have made rules that allow the connections.
Do as you please, allow or block them. It depends if you use multicast or not.
I’m not sure about the other one.