Blocking WAN multicast and drop log

[MUST-UPON-TURN]

I am getting frustrated with my ISP as they are allowing multicast data from others on their network so my firewall logs are filled up with these blocks. How can I setup a firewall rule for the WAN interface that will block all these attempts and then not log them?

I tried setting source = network (xxx.xxx.xxx.1/24) and then destination WAN Net and This Firewall but both seem to still are logging. :(

[mcury]

You could create an alias with the multicast blocks:
https://www.iana.org/assignments/multicast-addresses/multicast-addresses.xhtml

After that, you create a firewall rule in your WAN interface, setting this alias as destination, and mark the not log option.

And also I would like to recommend you to change the ISP... that is not good

[MUST-UPON-TURN]

Thank you @mcury I will give that a try. Unfortunately this is the best ISP around, I have never had this happen at other locations with same ISP. I called them about it but the support rep was like "is service impacted, if not then whats the problem." :(

[mcury]

@MUST-UPON-TURN Hm, maybe there is a bad switch around? Providers go to the last mile only.. The infra inside could be the culprit..