I am having the same problem when using McAfee Total Protection on my home network configured with IPv4 and IPv6 DNS (both from my ISP).
Instructions suggest I can configure either the router or McAfee to fix this but the instructions do not match the version of McAfee that I have.
Is the macafee firewall stateful? If not, this would explain this activity. I have a FortiGate firewall blocking all inbound traffic, so it's not possible for 8.8.8.8 to enter in my network, unless it's simply trying to reply to a DNS query, which is what I suspect is happening. This firewall would then be stateless instead. Who can verify?
gosh... unbelievable...
J-U-S-T- T-E-L-L- W-H-A-T D-O-E-S I-T M-E-A-N.
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